diff --git a/app/Config/Cache.php b/app/Config/Cache.php
index 8c7900a84926..a3b3bbcf895d 100644
--- a/app/Config/Cache.php
+++ b/app/Config/Cache.php
@@ -46,6 +46,8 @@ class Cache extends BaseConfig
 	 * system.
 	 *
 	 * @var string
+	 *
+	 * @deprecated Use the driver-specific variant under $file
 	 */
 	public $storePath = WRITEPATH . 'cache/';
 
@@ -80,6 +82,20 @@ class Cache extends BaseConfig
 	 */
 	public $prefix = '';
 
+	/**
+	 * --------------------------------------------------------------------------
+	 * File settings
+	 * --------------------------------------------------------------------------
+	 * Your file storage preferences can be specified below, if you are using
+	 * the File driver.
+	 *
+	 * @var array<string, string|int|null>
+	 */
+	public $file = [
+		'storePath' => WRITEPATH . 'cache/',
+		'mode'      => 0640,
+	];
+
 	/**
 	 * -------------------------------------------------------------------------
 	 * Memcached settings
diff --git a/app/Config/Mimes.php b/app/Config/Mimes.php
index 9eb6e2e181e5..25c79791a76d 100644
--- a/app/Config/Mimes.php
+++ b/app/Config/Mimes.php
@@ -149,6 +149,7 @@ class Mimes
 			'multipart/x-zip',
 		],
 		'rar'   => [
+			'application/vnd.rar',
 			'application/x-rar',
 			'application/rar',
 			'application/x-rar-compressed',
diff --git a/system/Cache/Handlers/FileHandler.php b/system/Cache/Handlers/FileHandler.php
index e99874e9d173..d4ed24aecd6f 100644
--- a/system/Cache/Handlers/FileHandler.php
+++ b/system/Cache/Handlers/FileHandler.php
@@ -34,6 +34,16 @@ class FileHandler implements CacheInterface
 	 */
 	protected $path;
 
+	/**
+	 * Mode for the stored files.
+	 * Must be chmod-safe (octal).
+	 *
+	 * @var integer
+	 *
+	 * @see https://www.php.net/manual/en/function.chmod.php
+	 */
+	protected $mode;
+
 	//--------------------------------------------------------------------
 
 	/**
@@ -44,14 +54,24 @@ class FileHandler implements CacheInterface
 	 */
 	public function __construct(Cache $config)
 	{
-		$path = ! empty($config->storePath) ? $config->storePath : WRITEPATH . 'cache';
-		if (! is_really_writable($path))
+		if (! property_exists($config, 'file'))
+		{
+			$config->file = [
+				'storePath' => $config->storePath ?? WRITEPATH . 'cache',
+				'mode'      => 0640,
+			];
+		}
+
+		$this->path = ! empty($config->file['storePath']) ? $config->file['storePath'] : WRITEPATH . 'cache';
+		$this->path = rtrim($this->path, '/') . '/';
+
+		if (! is_really_writable($this->path))
 		{
-			throw CacheException::forUnableToWrite($path);
+			throw CacheException::forUnableToWrite($this->path);
 		}
 
-		$this->prefix = $config->prefix ?: '';
-		$this->path   = rtrim($path, '/') . '/';
+		$this->mode   = $config->file['mode'] ?? 0640;
+		$this->prefix = (string) $config->prefix;
 	}
 
 	//--------------------------------------------------------------------
@@ -105,7 +125,7 @@ public function save(string $key, $value, int $ttl = 60)
 
 		if ($this->writeFile($this->path . $key, serialize($contents)))
 		{
-			chmod($this->path . $key, 0640);
+			chmod($this->path . $key, $this->mode);
 
 			return true;
 		}
diff --git a/system/Cache/Handlers/MemcachedHandler.php b/system/Cache/Handlers/MemcachedHandler.php
index 84d6539bcc81..8a883e26823b 100644
--- a/system/Cache/Handlers/MemcachedHandler.php
+++ b/system/Cache/Handlers/MemcachedHandler.php
@@ -58,7 +58,7 @@ class MemcachedHandler implements CacheInterface
 	 */
 	public function __construct(Cache $config)
 	{
-		$this->prefix = $config->prefix ?: '';
+		$this->prefix = (string) $config->prefix;
 
 		if (! empty($config))
 		{
diff --git a/system/Cache/Handlers/PredisHandler.php b/system/Cache/Handlers/PredisHandler.php
index 81d982dd5f1b..2a062e17f2fa 100644
--- a/system/Cache/Handlers/PredisHandler.php
+++ b/system/Cache/Handlers/PredisHandler.php
@@ -58,7 +58,7 @@ class PredisHandler implements CacheInterface
 	 */
 	public function __construct(Cache $config)
 	{
-		$this->prefix = $config->prefix ?: '';
+		$this->prefix = (string) $config->prefix;
 
 		if (isset($config->redis))
 		{
diff --git a/system/Cache/Handlers/RedisHandler.php b/system/Cache/Handlers/RedisHandler.php
index 5af9f1f07fbf..d18efb1e93d5 100644
--- a/system/Cache/Handlers/RedisHandler.php
+++ b/system/Cache/Handlers/RedisHandler.php
@@ -58,7 +58,7 @@ class RedisHandler implements CacheInterface
 	 */
 	public function __construct(Cache $config)
 	{
-		$this->prefix = $config->prefix ?: '';
+		$this->prefix = (string) $config->prefix;
 
 		if (! empty($config))
 		{
diff --git a/system/Cache/Handlers/WincacheHandler.php b/system/Cache/Handlers/WincacheHandler.php
index a37aba2556be..4c445d4f0076 100644
--- a/system/Cache/Handlers/WincacheHandler.php
+++ b/system/Cache/Handlers/WincacheHandler.php
@@ -37,7 +37,7 @@ class WincacheHandler implements CacheInterface
 	 */
 	public function __construct(Cache $config)
 	{
-		$this->prefix = $config->prefix ?: '';
+		$this->prefix = (string) $config->prefix;
 	}
 
 	//--------------------------------------------------------------------
diff --git a/system/Config/View.php b/system/Config/View.php
index 6788b75b18ed..b57d94167422 100644
--- a/system/Config/View.php
+++ b/system/Config/View.php
@@ -16,6 +16,14 @@
  */
 class View extends BaseConfig
 {
+	/**
+	 * When false, the view method will clear the data between each
+	 * call.
+	 *
+	 * @var boolean
+	 */
+	public $saveData = true;
+
 	/**
 	 * Parser Filters map a filter name with any PHP callable. When the
 	 * Parser prepares a variable for display, it will chain it
diff --git a/system/HTTP/Request.php b/system/HTTP/Request.php
index f0bfb02c1d72..9b4c16df877e 100644
--- a/system/HTTP/Request.php
+++ b/system/HTTP/Request.php
@@ -43,8 +43,6 @@ class Request extends Message implements MessageInterface, RequestInterface
 	 */
 	protected $uri;
 
-	//--------------------------------------------------------------------
-
 	/**
 	 * Constructor.
 	 *
@@ -68,8 +66,6 @@ public function __construct($config = null)
 		}
 	}
 
-	//--------------------------------------------------------------------
-
 	/**
 	 * Validate an IP address
 	 *
@@ -85,8 +81,6 @@ public function isValidIP(string $ip = null, string $which = null): bool
 		return (new FormatRules())->valid_ip($ip, $which);
 	}
 
-	//--------------------------------------------------------------------
-
 	/**
 	 * Get the request method.
 	 *
@@ -101,8 +95,6 @@ public function getMethod(bool $upper = false): string
 		return ($upper) ? strtoupper($this->method) : strtolower($this->method);
 	}
 
-	//--------------------------------------------------------------------
-
 	/**
 	 * Sets the request method. Used when spoofing the request.
 	 *
@@ -124,16 +116,16 @@ public function setMethod(string $method)
 	 *
 	 * @param string $method
 	 *
-	 * @return self
+	 * @return static
 	 */
 	public function withMethod($method)
 	{
-		$clone = clone $this;
+		$request = clone $this;
 
-		return $clone->setMethod($method);
-	}
+		$request->method = $method;
 
-	//--------------------------------------------------------------------
+		return $request;
+	}
 
     /**
      * Retrieves the URI instance.
diff --git a/system/Validation/FormatRules.php b/system/Validation/FormatRules.php
index 57b211be5efe..cefe16469b5b 100644
--- a/system/Validation/FormatRules.php
+++ b/system/Validation/FormatRules.php
@@ -44,7 +44,8 @@ public function alpha_space(?string $value = null): bool
 			return true;
 		}
 
-		return (bool) preg_match('/^[A-Z ]+$/i', $value);
+		// @see https://regex101.com/r/LhqHPO/1
+		return (bool) preg_match('/\A[A-Z ]+\z/i', $value);
 	}
 
 	/**
@@ -56,7 +57,8 @@ public function alpha_space(?string $value = null): bool
 	 */
 	public function alpha_dash(?string $str = null): bool
 	{
-			return (bool) preg_match('/^[a-z0-9_-]+$/i', $str);
+		// @see https://regex101.com/r/XfVY3d/1
+		return (bool) preg_match('/\A[a-z0-9_-]+\z/i', $str);
 	}
 
 	/**
@@ -72,7 +74,8 @@ public function alpha_dash(?string $str = null): bool
 	 */
 	public function alpha_numeric_punct($str)
 	{
-		return (bool) preg_match('/^[A-Z0-9 ~!#$%\&\*\-_+=|:.]+$/i', $str);
+		// @see https://regex101.com/r/6N8dDY/1
+		return (bool) preg_match('/\A[A-Z0-9 ~!#$%\&\*\-_+=|:.]+\z/i', $str);
 	}
 
 	/**
@@ -96,7 +99,8 @@ public function alpha_numeric(?string $str = null): bool
 	 */
 	public function alpha_numeric_space(?string $str = null): bool
 	{
-		return (bool) preg_match('/^[A-Z0-9 ]+$/i', $str);
+		// @see https://regex101.com/r/0AZDME/1
+		return (bool) preg_match('/\A[A-Z0-9 ]+\z/i', $str);
 	}
 
 	/**
@@ -123,7 +127,8 @@ public function string($str = null): bool
 	 */
 	public function decimal(?string $str = null): bool
 	{
-		return (bool) preg_match('/^[-+]?[0-9]{0,}\.?[0-9]+$/', $str);
+		// @see https://regex101.com/r/HULifl/1/
+		return (bool) preg_match('/\A[-+]?[0-9]{0,}\.?[0-9]+\z/', $str);
 	}
 
 	/**
@@ -147,7 +152,7 @@ public function hex(?string $str = null): bool
 	 */
 	public function integer(?string $str = null): bool
 	{
-		return (bool) preg_match('/^[\-+]?[0-9]+$/', $str);
+		return (bool) preg_match('/\A[\-+]?[0-9]+\z/', $str);
 	}
 
 	/**
@@ -181,7 +186,8 @@ public function is_natural_no_zero(?string $str = null): bool
 	 */
 	public function numeric(?string $str = null): bool
 	{
-		return (bool) preg_match('/^[\-+]?[0-9]*\.?[0-9]+$/', $str);
+		// @see https://regex101.com/r/bb9wtr/1
+		return (bool) preg_match('/\A[\-+]?[0-9]*\.?[0-9]+\z/', $str);
 	}
 
 	/**
@@ -253,6 +259,7 @@ public function valid_json(string $str = null): bool
 	 */
 	public function valid_email(string $str = null): bool
 	{
+		// @see https://regex101.com/r/wlJG1t/1/
 		if (function_exists('idn_to_ascii') && defined('INTL_IDNA_VARIANT_UTS46') && preg_match('#\A([^@]+)@(.+)\z#', $str, $matches))
 		{
 			$str = $matches[1] . '@' . idn_to_ascii($matches[2], 0, INTL_IDNA_VARIANT_UTS46);
diff --git a/system/View/RendererInterface.php b/system/View/RendererInterface.php
index 0128d1c8f696..c8a3b7a6ed1e 100644
--- a/system/View/RendererInterface.php
+++ b/system/View/RendererInterface.php
@@ -26,9 +26,7 @@ interface RendererInterface
 	 * @param array   $options  Reserved for 3rd-party uses since
 	 *                          it might be needed to pass additional info
 	 *                          to other template engines.
-	 * @param boolean $saveData If true, will save data for use with any other calls,
-	 *                          if false, will clean the data after displaying the view,
-	 *                             if not specified, use the config setting.
+	 * @param boolean $saveData Whether to save data for subsequent calls
 	 *
 	 * @return string
 	 */
@@ -44,9 +42,7 @@ public function render(string $view, array $options = null, bool $saveData = fal
 	 * @param array   $options  Reserved for 3rd-party uses since
 	 *                          it might be needed to pass additional info
 	 *                          to other template engines.
-	 * @param boolean $saveData If true, will save data for use with any other calls,
-	 *                          if false, will clean the data after displaying the view,
-	 *                             if not specified, use the config setting.
+	 * @param boolean $saveData Whether to save data for subsequent calls
 	 *
 	 * @return string
 	 */
diff --git a/system/View/View.php b/system/View/View.php
index 3d98fae92662..a9f190afefdb 100644
--- a/system/View/View.php
+++ b/system/View/View.php
@@ -142,7 +142,7 @@ public function __construct(ViewConfig $config, string $viewPath = null, FileLoc
 		$this->loader   = $loader ?? Services::locator();
 		$this->logger   = $logger ?? Services::logger();
 		$this->debug    = $debug ?? CI_DEBUG;
-		$this->saveData = $config->saveData ?? null;
+		$this->saveData = (bool) $config->saveData;
 	}
 
 	//--------------------------------------------------------------------
@@ -152,12 +152,16 @@ public function __construct(ViewConfig $config, string $viewPath = null, FileLoc
 	 * data that has already been set.
 	 *
 	 * Valid $options:
-	 *     - cache 		number of seconds to cache for
-	 *  - cache_name	Name to use for cache
+	 *  - cache      Number of seconds to cache for
+	 *  - cache_name Name to use for cache
 	 *
-	 * @param string       $view
-	 * @param array|null   $options
-	 * @param boolean|null $saveData
+	 * @param string       $view     File name of the view source
+	 * @param array|null   $options  Reserved for 3rd-party uses since
+	 *                               it might be needed to pass additional info
+	 *                               to other template engines.
+	 * @param boolean|null $saveData If true, saves data for subsequent calls,
+	 *                               if false, cleans the data after displaying,
+	 *                               if null, uses the config setting.
 	 *
 	 * @return string
 	 */
@@ -172,7 +176,7 @@ public function render(string $view, array $options = null, bool $saveData = nul
 		$fileExt                     = pathinfo($view, PATHINFO_EXTENSION);
 		$realPath                    = empty($fileExt) ? $view . '.php' : $view; // allow Views as .html, .tpl, etc (from CI3)
 		$this->renderVars['view']    = $realPath;
-		$this->renderVars['options'] = $options;
+		$this->renderVars['options'] = $options ?? [];
 
 		// Was it cached?
 		if (isset($this->renderVars['options']['cache']))
@@ -272,13 +276,13 @@ public function render(string $view, array $options = null, bool $saveData = nul
 	 * data that has already been set.
 	 * Cache does not apply, because there is no "key".
 	 *
-	 * @param string  $view     The view contents
-	 * @param array   $options  Reserved for 3rd-party uses since
-	 *                          it might be needed to pass additional info
-	 *                          to other template engines.
-	 * @param boolean $saveData If true, will save data for use with any other calls,
-	 *                          if false, will clean the data after displaying the view,
-	 *                             if not specified, use the config setting.
+	 * @param string       $view     The view contents
+	 * @param array|null   $options  Reserved for 3rd-party uses since
+	 *                               it might be needed to pass additional info
+	 *                               to other template engines.
+	 * @param boolean|null $saveData If true, saves data for subsequent calls,
+	 *                               if false, cleans the data after displaying,
+	 *                               if null, uses the config setting.
 	 *
 	 * @return string
 	 */
diff --git a/tests/system/Cache/Handlers/FileHandlerTest.php b/tests/system/Cache/Handlers/FileHandlerTest.php
index bb77935abf10..232b3e71b5f9 100644
--- a/tests/system/Cache/Handlers/FileHandlerTest.php
+++ b/tests/system/Cache/Handlers/FileHandlerTest.php
@@ -26,13 +26,18 @@ protected function setUp(): void
 	{
 		parent::setUp();
 
-		//Initialize path
-		$this->config             = new \Config\Cache();
-		$this->config->storePath .= self::$directory;
+		if (! function_exists('octal_permissions'))
+		{
+			helper('filesystem');
+		}
+
+		// Initialize path
+		$this->config                     = new \Config\Cache();
+		$this->config->file['storePath'] .= self::$directory;
 
-		if (! is_dir($this->config->storePath))
+		if (! is_dir($this->config->file['storePath']))
 		{
-			mkdir($this->config->storePath, 0777, true);
+			mkdir($this->config->file['storePath'], 0777, true);
 		}
 
 		$this->fileHandler = new FileHandler($this->config);
@@ -41,20 +46,20 @@ protected function setUp(): void
 
 	public function tearDown(): void
 	{
-		if (is_dir($this->config->storePath))
+		if (is_dir($this->config->file['storePath']))
 		{
-			chmod($this->config->storePath, 0777);
+			chmod($this->config->file['storePath'], 0777);
 
 			foreach (self::getKeyArray() as $key)
 			{
-				if (is_file($this->config->storePath . DIRECTORY_SEPARATOR . $key))
+				if (is_file($this->config->file['storePath'] . DIRECTORY_SEPARATOR . $key))
 				{
-					chmod($this->config->storePath . DIRECTORY_SEPARATOR . $key, 0777);
-					unlink($this->config->storePath . DIRECTORY_SEPARATOR . $key);
+					chmod($this->config->file['storePath'] . DIRECTORY_SEPARATOR . $key, 0777);
+					unlink($this->config->file['storePath'] . DIRECTORY_SEPARATOR . $key);
 				}
 			}
 
-			rmdir($this->config->storePath);
+			rmdir($this->config->file['storePath']);
 		}
 	}
 
@@ -67,15 +72,15 @@ public function testNewWithNonWritablePath()
 	{
 		$this->expectException('CodeIgniter\Cache\Exceptions\CacheException');
 
-		chmod($this->config->storePath, 0444);
+		chmod($this->config->file['storePath'], 0444);
 		new FileHandler($this->config);
 	}
 
 	public function testSetDefaultPath()
 	{
-		//Initialize path
-		$config            = new \Config\Cache();
-		$config->storePath = null;
+		// Initialize path
+		$config                    = new \Config\Cache();
+		$config->file['storePath'] = null;
 
 		$this->fileHandler = new FileHandler($config);
 		$this->fileHandler->initialize();
@@ -98,7 +103,7 @@ public function testSave()
 	{
 		$this->assertTrue($this->fileHandler->save(self::$key1, 'value'));
 
-		chmod($this->config->storePath, 0444);
+		chmod($this->config->file['storePath'], 0444);
 		$this->assertFalse($this->fileHandler->save(self::$key2, 'value'));
 	}
 
@@ -173,6 +178,36 @@ public function testIsSupported()
 		$this->assertTrue($this->fileHandler->isSupported());
 	}
 
+	/**
+	 * @dataProvider modeProvider
+	 */
+	public function testSaveMode($int, $string)
+	{
+		// Initialize mode
+		$config               = new \Config\Cache();
+		$config->file['mode'] = $int;
+
+		$this->fileHandler = new FileHandler($config);
+		$this->fileHandler->initialize();
+
+		$this->fileHandler->save(self::$key1, 'value');
+
+		$file = $config->file['storePath'] . DIRECTORY_SEPARATOR . self::$key1;
+		$mode = octal_permissions(fileperms($file));
+
+		$this->assertEquals($string, $mode);
+	}
+
+	public function modeProvider()
+	{
+		return [
+			[0640, '640'],
+			[0600, '600'],
+			[0660, '660'],
+			[0777, '777'],
+		];
+	}
+
 	//--------------------------------------------------------------------
 
 	public function testFileHandler()
@@ -200,8 +235,8 @@ final class BaseTestFileHandler extends FileHandler
 
 	public function __construct()
 	{
-		$this->config             = new \Config\Cache();
-		$this->config->storePath .= self::$directory;
+		$this->config                     = new \Config\Cache();
+		$this->config->file['storePath'] .= self::$directory;
 
 		parent::__construct($this->config);
 	}
diff --git a/tests/system/Validation/FormatRulesTest.php b/tests/system/Validation/FormatRulesTest.php
index d7b171fe098a..56145c703201 100644
--- a/tests/system/Validation/FormatRulesTest.php
+++ b/tests/system/Validation/FormatRulesTest.php
@@ -424,6 +424,10 @@ public function alphaSpaceProvider()
 				FormatRulesTest::ALPHABET . ' ',
 				true,
 			],
+			[
+				FormatRulesTest::ALPHABET . "\n",
+				false,
+			],
 			[
 				FormatRulesTest::ALPHABET . '1',
 				false,
@@ -506,6 +510,10 @@ public function alphaNumericPunctProvider()
 				FormatRulesTest::ALPHANUMERIC . '`',
 				false,
 			],
+			[
+				FormatRulesTest::ALPHANUMERIC . "\n",
+				false,
+			],
 			[
 				FormatRulesTest::ALPHANUMERIC . '@',
 				false,
@@ -599,6 +607,10 @@ public function alphaNumericSpaceProvider()
 				' ' . FormatRulesTest::ALPHANUMERIC . '-',
 				false,
 			],
+			[
+				' ' . FormatRulesTest::ALPHANUMERIC . "\n",
+				false,
+			],
 			[
 				null,
 				false,
@@ -636,6 +648,10 @@ public function alphaDashProvider()
 				FormatRulesTest::ALPHANUMERIC . '-\ ',
 				false,
 			],
+			[
+				FormatRulesTest::ALPHANUMERIC . "-\n",
+				false,
+			],
 			[
 				null,
 				false,
@@ -722,6 +738,10 @@ public function numericProvider()
 				'+42',
 				true,
 			],
+			[
+				"+42\n",
+				false,
+			],
 			[
 				'123a',
 				false,
@@ -771,6 +791,10 @@ public function integerProvider()
 				'-1',
 				true,
 			],
+			[
+				"+42\n",
+				false,
+			],
 			[
 				'123a',
 				false,
@@ -824,6 +848,10 @@ public function decimalProvider()
 				'0',
 				true,
 			],
+			[
+				"0\n",
+				false,
+			],
 			[
 				'1.0a',
 				false,
diff --git a/user_guide_src/source/changelogs/v4.0.5.rst b/user_guide_src/source/changelogs/v4.0.5.rst
index 9a55cf6d6e60..90a8ac7ab62e 100644
--- a/user_guide_src/source/changelogs/v4.0.5.rst
+++ b/user_guide_src/source/changelogs/v4.0.5.rst
@@ -14,6 +14,7 @@ Enhancements:
 - Support for setting SameSite attribute on Session and CSRF cookies has been added. For security and compatibility with latest browser versions, the default setting is ``Lax``.
 - Guessing file extensions from mime type in ``Config\Mimes::guessExtensionFromType`` now only reverse searches the ``$mimes`` array if no extension is proposed (i.e., usually not for uploaded files).
 - The getter functions for file extensions of uploaded files now have different fallback values (``$this->getClientExtension()`` for ``UploadedFile->getExtension()`` and ``''`` for ``UploadedFile->guessExtension()``). This is a security fix and makes the process less dependent on the client.
+- The Cache ``FileHandler`` now allows setting the file permissions mode via ``Config\Cache``
 
 Changes:
 
@@ -44,3 +45,4 @@ Deprecations:
 - Deprecated ``CodeIgniter\Config\Config`` in favor of ``CodeIgniter\Config\Factories::config()``
 - Deprecated ``CodeIgniter\HTTP\Message::getHeader`` in favor of ``header()`` to prepare for PSR-7
 - Deprecated ``CodeIgniter\HTTP\Message::getHeaders`` in favor of ``headers()`` to prepare for PSR-7
+- Deprecated ``Config\Cache::$storePath`` in favor of ``Config\Cache::$file['storePath']``
diff --git a/user_guide_src/source/libraries/caching.rst b/user_guide_src/source/libraries/caching.rst
index 368a34498c09..8e0f38d3a6e0 100644
--- a/user_guide_src/source/libraries/caching.rst
+++ b/user_guide_src/source/libraries/caching.rst
@@ -57,11 +57,11 @@ more complex, multi-server setups.
 **$prefix**
 
 If you have more than one application using the same cache storage, you can add a custom prefix
-here that is prepended to all key names.
+string here that is prepended to all key names.
 
-**$path**
+**$file**
 
-This is used by the ``file`` handler to show where it should save the cache files to.
+This is an array of settings specific to the  ``File`` handler to determine how it should save the cache files.
 
 **$memcached**
 
@@ -212,7 +212,8 @@ File-based Caching
 Unlike caching from the Output Class, the driver file-based caching
 allows for pieces of view files to be cached. Use this with care, and
 make sure to benchmark your application, as a point can come where disk
-I/O will negate positive gains by caching. This requires a writable cache directory to be really writable (0777).
+I/O will negate positive gains by caching. This requires a cache
+directory to be really writable by the application.
 
 =================
 Memcached Caching
diff --git a/user_guide_src/source/outgoing/view_renderer.rst b/user_guide_src/source/outgoing/view_renderer.rst
index a55d848accae..e77413cbb97a 100644
--- a/user_guide_src/source/outgoing/view_renderer.rst
+++ b/user_guide_src/source/outgoing/view_renderer.rst
@@ -102,6 +102,9 @@ Several options can be passed to the ``render()`` or ``renderString()`` methods:
 		ignored for renderString()
 -   ``saveData`` - true if the view data parameters should be retained for subsequent calls
 
+.. note:: ``saveData`` as defined by the interface must be a boolean, but implementing
+	classes (like ``View`` below) may extend this to include ``null`` values.
+
 Class Reference
 ***************
 
@@ -110,9 +113,9 @@ Class Reference
 	.. php:method:: render($view[, $options[, $saveData=false]])
                 :noindex:
 
-		:param  string  $view: File name of the view source
-		:param  array   $options: Array of options, as key/value pairs
-		:param  boolean $saveData: If true, will save data for use with any other calls, if false, will clean the data after rendering the view.
+		:param  string       $view: File name of the view source
+		:param  array        $options: Array of options, as key/value pairs
+		:param  boolean|null $saveData: If true, will save data for use with any other calls. If false, will clean the data after rendering the view. If null, uses the config setting.
 		:returns: The rendered text for the chosen view
 		:rtype: string
 
@@ -123,9 +126,9 @@ Class Reference
 	.. php:method:: renderString($view[, $options[, $saveData=false]])
                 :noindex:
 
-		:param  string  $view: Contents of the view to render, for instance content retrieved from a database
-		:param  array   $options: Array of options, as key/value pairs
-		:param  boolean $saveData: If true, will save data for use with any other calls, if false, will clean the data after rendering the view.
+		:param  string       $view: Contents of the view to render, for instance content retrieved from a database
+		:param  array        $options: Array of options, as key/value pairs
+		:param  boolean|null $saveData: If true, will save data for use with any other calls. If false, will clean the data after rendering the view. If null, uses the config setting.
 		:returns: The rendered text for the chosen view
 		:rtype: string