diff --git a/src/main/resources/antisamy-anythinggoes.xml b/src/main/resources/antisamy-anythinggoes.xml
index f23706f8..7ac09993 100644
--- a/src/main/resources/antisamy-anythinggoes.xml
+++ b/src/main/resources/antisamy-anythinggoes.xml
@@ -102,8 +102,8 @@ http://www.w3.org/TR/html401/struct/global.html
 		<regexp name="angle" value="(-|\+)?([0-9]+(\.[0-9]+)?)(deg|grads|rad)"/>
 		<regexp name="time" value="([0-9]+(\.[0-9]+)?)(ms|s)"/>
 		<regexp name="frequency" value="([0-9]+(\.[0-9]+)?)(hz|khz)"/>
-		<regexp name="length" value="((-|\+)?0|(-|\+)?([0-9]+(\.[0-9]+)?)(em|ex|px|in|cm|mm|pt|pc))"/>
-		<regexp name="positiveLength" value="((\+)?0|(\+)?([0-9]+(\.[0-9]+)?)(em|ex|px|in|cm|mm|pt|pc))"/>
+		<regexp name="length" value="((-|\+)?0|(-|\+)?([0-9]+(\.[0-9]+)?([eE][+-]?[0-9]+)?)(em|ex|px|in|cm|mm|pt|pc))"/>
+		<regexp name="positiveLength" value="((\+)?0|(\+)?([0-9]+(\.[0-9]+)?([eE][+-]?[0-9]+)?)(em|ex|px|in|cm|mm|pt|pc))"/>
 		<regexp name="percentage" value="(-|\+)?([0-9]+(\.[0-9]+)?)%"/>
 		<regexp name="positivePercentage" value="(\+)?([0-9]+(\.[0-9]+)?)%"/>
 
diff --git a/src/main/resources/antisamy-ebay.xml b/src/main/resources/antisamy-ebay.xml
index 839faea0..700ddb60 100644
--- a/src/main/resources/antisamy-ebay.xml
+++ b/src/main/resources/antisamy-ebay.xml
@@ -100,8 +100,8 @@ http://www.w3.org/TR/html401/struct/global.html
 		<regexp name="angle" value="(-|\+)?([0-9]+(\.[0-9]+)?)(deg|grads|rad)"/>
 		<regexp name="time" value="([0-9]+(\.[0-9]+)?)(ms|s)"/>
 		<regexp name="frequency" value="([0-9]+(\.[0-9]+)?)(hz|khz)"/>
-		<regexp name="length" value="((-|\+)?0|(-|\+)?([0-9]+(\.[0-9]+)?)(em|ex|px|in|cm|mm|pt|pc))"/>
-		<regexp name="positiveLength" value="((\+)?0|(\+)?([0-9]+(\.[0-9]+)?)(em|ex|px|in|cm|mm|pt|pc))"/>
+		<regexp name="length" value="((-|\+)?0|(-|\+)?([0-9]+(\.[0-9]+)?([eE][+-]?[0-9]+)?)(em|ex|px|in|cm|mm|pt|pc))"/>
+		<regexp name="positiveLength" value="((\+)?0|(\+)?([0-9]+(\.[0-9]+)?([eE][+-]?[0-9]+)?)(em|ex|px|in|cm|mm|pt|pc))"/>
 		<regexp name="percentage" value="(-|\+)?([0-9]+(\.[0-9]+)?)%"/>
 		<regexp name="positivePercentage" value="(\+)?([0-9]+(\.[0-9]+)?)%"/>
 
diff --git a/src/main/resources/antisamy-myspace.xml b/src/main/resources/antisamy-myspace.xml
index 88d4a143..166165ce 100644
--- a/src/main/resources/antisamy-myspace.xml
+++ b/src/main/resources/antisamy-myspace.xml
@@ -102,8 +102,8 @@ http://www.w3.org/TR/html401/struct/global.html
 		<regexp name="angle" value="(-|\+)?([0-9]+(\.[0-9]+)?)(deg|grads|rad)"/>
 		<regexp name="time" value="([0-9]+(\.[0-9]+)?)(ms|s)"/>
 		<regexp name="frequency" value="([0-9]+(\.[0-9]+)?)(hz|khz)"/>
-		<regexp name="length" value="((-|\+)?0|(-|\+)?([0-9]+(\.[0-9]+)?)(em|ex|px|in|cm|mm|pt|pc))"/>
-		<regexp name="positiveLength" value="((\+)?0|(\+)?([0-9]+(\.[0-9]+)?)(em|ex|px|in|cm|mm|pt|pc))"/>
+		<regexp name="length" value="((-|\+)?0|(-|\+)?([0-9]+(\.[0-9]+)?([eE][+-]?[0-9]+)?)(em|ex|px|in|cm|mm|pt|pc))"/>
+		<regexp name="positiveLength" value="((\+)?0|(\+)?([0-9]+(\.[0-9]+)?([eE][+-]?[0-9]+)?)(em|ex|px|in|cm|mm|pt|pc))"/>
 		<regexp name="percentage" value="(-|\+)?([0-9]+(\.[0-9]+)?)%"/>
 		<regexp name="positivePercentage" value="(\+)?([0-9]+(\.[0-9]+)?)%"/>
 
diff --git a/src/main/resources/antisamy.xml b/src/main/resources/antisamy.xml
index 917da876..c6e2304f 100644
--- a/src/main/resources/antisamy.xml
+++ b/src/main/resources/antisamy.xml
@@ -107,8 +107,8 @@ http://www.w3.org/TR/html401/struct/global.html
 		<regexp name="angle" value="(-|\+)?([0-9]+(\.[0-9]+)?)(deg|grads|rad)"/>
 		<regexp name="time" value="([0-9]+(\.[0-9]+)?)(ms|s)"/>
 		<regexp name="frequency" value="([0-9]+(\.[0-9]+)?)(hz|khz)"/>	
-		<regexp name="length" value="((-|\+)?0|(-|\+)?([0-9]+(\.[0-9]+)?)(em|ex|px|in|cm|mm|pt|pc))"/>
-		<regexp name="positiveLength" value="((\+)?0|(\+)?([0-9]+(\.[0-9]+)?)(em|ex|px|in|cm|mm|pt|pc))"/>
+		<regexp name="length" value="((-|\+)?0|(-|\+)?([0-9]+(\.[0-9]+)?([eE][+-]?[0-9]+)?)(em|ex|px|in|cm|mm|pt|pc))"/>
+		<regexp name="positiveLength" value="((\+)?0|(\+)?([0-9]+(\.[0-9]+)?([eE][+-]?[0-9]+)?)(em|ex|px|in|cm|mm|pt|pc))"/>
 		<regexp name="percentage" value="(-|\+)?([0-9]+(\.[0-9]+)?)%"/>
 		<regexp name="positivePercentage" value="(\+)?([0-9]+(\.[0-9]+)?)%"/>
 		
diff --git a/src/test/java/org/owasp/validator/html/test/AntiSamyTest.java b/src/test/java/org/owasp/validator/html/test/AntiSamyTest.java
index 99ba9903..689402b0 100644
--- a/src/test/java/org/owasp/validator/html/test/AntiSamyTest.java
+++ b/src/test/java/org/owasp/validator/html/test/AntiSamyTest.java
@@ -1509,5 +1509,23 @@ public void testGithubIssue99() throws ScanException, PolicyException {
         assertThat(as.scan("<p lang=\"en-GB\">This paragraph is defined as British English.</p>", policy, AntiSamy.DOM).getCleanHTML(), containsString("lang=\"en-GB\""));
         assertThat(as.scan("<p lang=\"en-GB\">This paragraph is defined as British English.</p>", policy, AntiSamy.SAX).getCleanHTML(), containsString("lang=\"en-GB\""));
     }
+
+    @Test
+    public void testGithubIssue101() throws ScanException, PolicyException {
+        // Test that margin attribute is not removed when value has too much significant figures.
+        // Current behavior is that decimals like 0.0001 are internally translated to 1.0E-4, this
+        // is reflected on regex validation and actual output. The inconsistency is due to Batik CSS.
+        assertThat(as.scan("<p style=\"margin: 0.0001pt;\">Some text.</p>", policy, AntiSamy.DOM).getCleanHTML(), containsString("margin"));
+        assertThat(as.scan("<p style=\"margin: 0.0001pt;\">Some text.</p>", policy, AntiSamy.SAX).getCleanHTML(), containsString("margin"));
+        assertThat(as.scan("<p style=\"margin: 10000000pt;\">Some text.</p>", policy, AntiSamy.DOM).getCleanHTML(), containsString("margin"));
+        assertThat(as.scan("<p style=\"margin: 10000000pt;\">Some text.</p>", policy, AntiSamy.SAX).getCleanHTML(), containsString("margin"));
+        assertThat(as.scan("<p style=\"margin: 1.0E-4pt;\">Some text.</p>", policy, AntiSamy.DOM).getCleanHTML(), containsString("margin"));
+        assertThat(as.scan("<p style=\"margin: 1.0E-4pt;\">Some text.</p>", policy, AntiSamy.SAX).getCleanHTML(), containsString("margin"));
+        // When using exponential directly the "e" or "E" is internally considered as the start of
+        // the dimension/unit type. This creates inconsistencies that make the regex validation fail,
+        // also in cases like 1e4pt where "e" is considered as dimension instead of "pt".
+        assertThat(as.scan("<p style=\"margin: 1.0E+4pt;\">Some text.</p>", policy, AntiSamy.DOM).getCleanHTML(), not(containsString("margin")));
+        assertThat(as.scan("<p style=\"margin: 1.0E+4pt;\">Some text.</p>", policy, AntiSamy.SAX).getCleanHTML(), not(containsString("margin")));
+    }
 }