diff --git a/build/build b/build/build
index 8f4131aa..023d185e 100755
--- a/build/build
+++ b/build/build
@@ -85,6 +85,7 @@ usage()
 program_dir=$(dirname "$0") || exit 1
 jas_realpath="$program_dir/jas_realpath"
 abs_program_dir=$("$jas_realpath" "$program_dir") || panic
+sysinfo_program="$program_dir/sysinfo"
 
 ################################################################################
 # Process command line.
@@ -395,6 +396,16 @@ if [ -z "$os" ]; then
 	fi
 fi
 
+sysinfo_data="$("$sysinfo_program" -a)" || \
+  panic "cannot get system information"
+cat <<- EOF
+================================================================================
+System Information
+$sysinfo_data
+================================================================================
+EOF
+[ $? -eq 0 ] || panic "cat failed"
+
 ################################################################################
 # Apply some platform-specific hacks.
 ################################################################################
diff --git a/build/build_all b/build/build_all
index e7d5f68e..56031950 100755
--- a/build/build_all
+++ b/build/build_all
@@ -10,6 +10,7 @@ program_dir=$(dirname "$0") || exit 1
 jas_realpath="$program_dir/jas_realpath"
 abs_program_dir=$("$jas_realpath" "$program_dir") || panic
 build_program="$program_dir/build"
+sysinfo_program="$program_dir/sysinfo"
 
 list_directory()
 {
@@ -284,6 +285,15 @@ if [ -n "$command_file" ]; then
 	source "$command_file" || panic "source failed"
 fi
 
+sysinfo_data="$("$sysinfo_program" -a)" || \
+  panic "cannot get system information"
+cat <<- EOF
+================================================================================
+System Information
+$sysinfo_data
+================================================================================
+EOF
+
 os=unknown
 if [ -n "$RUNNER_OS" ]; then
 	case "$RUNNER_OS" in
diff --git a/build/sysinfo b/build/sysinfo
new file mode 100755
index 00000000..d758b333
--- /dev/null
+++ b/build/sysinfo
@@ -0,0 +1,79 @@
+#! /usr/bin/env bash
+
+panic()
+{
+	echo "ERROR: $@" 1>&2
+	exit 1
+}
+
+eecho()
+{
+	echo "$@" 1>&2
+}
+
+all_keys=(os kernel release)
+verbose=0
+keys=()
+
+while getopts avork option; do
+	case "$option" in
+	a)
+		keys=("${all_keys[@]}");;
+	v)
+		verbose=$((verbose + 1));;
+	o)
+		keys+=(os);;
+	k)
+		keys+=(kernel);;
+	r)
+		keys+=(release);;
+	\?)
+		panic "invalid option $option"
+		break;;
+	esac
+done
+shift $((OPTIND - 1))
+
+if [ "${#keys[@]}" -eq 0 ]; then
+	exit 0
+fi
+
+release="$(uname -r)" || panic
+kernel="$(uname)" || panic
+
+if [ "$verbose" -ge 1 ]; then
+	eecho "uname $name"
+	eecho "uname -r $release"
+fi
+
+os=
+
+case "$release" in
+*[Mm]icrosoft*)
+	os=windows;;
+esac
+
+if [ -z "$os" ]; then
+	case "$kernel" in
+	*[Ll]inux*)
+		os=linux;;
+	esac
+fi
+
+if [ -z "$os" ]; then
+	os=unknown
+fi
+
+for key in "${keys[@]}"; do
+	case "$key" in
+	os)
+		value="$os";;
+	kernel)
+		value="$kernel";;
+	release)
+		value="$release";;
+	*)
+		panic;;
+	esac
+	echo "$value" || panic
+done
diff --git a/src/libjasper/jpc/jpc_enc.c b/src/libjasper/jpc/jpc_enc.c
index 38659e2f..64f8aa51 100644
--- a/src/libjasper/jpc/jpc_enc.c
+++ b/src/libjasper/jpc/jpc_enc.c
@@ -1271,10 +1271,11 @@ assert(jas_image_numcmpts(enc->image) == 3);
 			}
 
 #if 0
-			jas_eprintf("mingbits %d\n", mingbits);
+			jas_eprintf("numgbits %d mingbits %d\n", cp->tccp.numgbits,
+			  mingbits);
 #endif
 			if (mingbits > cp->tccp.numgbits) {
-				jas_logerrorf("error: too few guard bits (%d not < %d)\n",
+				jas_logerrorf("error: too few guard bits (%d < %d)\n",
 				  cp->tccp.numgbits, mingbits);
 				return -1;
 			}
diff --git a/test/bin/run_codec_test b/test/bin/run_codec_test
index 8bf59773..826a9df4 100755
--- a/test/bin/run_codec_test
+++ b/test/bin/run_codec_test
@@ -61,8 +61,9 @@ tests=()
 enc=jasper
 dec=jasper
 skip_bugs=1
+exclude_tests=()
 
-while getopts d:e:i:vBE: opt; do
+while getopts d:e:i:vBE:I:X: opt; do
 	case "$opt" in
 	d)
 		dec="$OPTARG";;
@@ -90,6 +91,10 @@ while getopts d:e:i:vBE: opt; do
 			;;
 		esac
 		;;
+	I)
+		tests+=("$OPTARG");;
+	X)
+		exclude_tests+=("$OPTARG");;
 	\?)
 		usage
 		break;;
@@ -98,7 +103,7 @@ done
 shift $((OPTIND - 1))
 
 if [ $# -ge 1 ]; then
-	tests=("$@")
+	tests+=("$@")
 fi
 
 ################################################################################
@@ -110,6 +115,29 @@ if [ "${#tests[@]}" -eq 0 ]; then
 	tcf_gettestids "$test_file" tests || panic "cannot get tests"
 fi
 
+# Remove any excluded tests from the list of tests to be run.
+tmp_tests=()
+for test in "${tests[@]}"; do
+	exclude=0
+	for exclude_test in "${exclude_tests[@]}"; do
+		if [ "$exclude_test" = "$test" ]; then
+			exclude=1
+			break
+		fi
+	done
+	if [ "$exclude" -eq 0 ]; then
+		tmp_tests+=("$test")
+	fi
+done
+tests=("${tmp_tests[@]}")
+
+if [ "$verbose" -ge 1 ]; then
+	echo "The following tests have been selected:"
+	for test in "${tests[@]}"; do
+		echo "    $test"
+	done
+fi
+
 [ -d $TMPDIR ] || mkdir -p $TMPDIR
 [ -d $DATADIR ] || mkdir -p $DATADIR
 
diff --git a/test/bin/run_test_3 b/test/bin/run_test_3
index 433c4b27..fad80412 100755
--- a/test/bin/run_test_3
+++ b/test/bin/run_test_3
@@ -12,6 +12,8 @@ fi
 
 cmd_dir=$(dirname "$0") || exit 1
 source "$cmd_dir"/utilities || exit 1
+top_dir="$cmd_dir/../.."
+sysinfo_program="$top_dir/build/sysinfo"
 
 debug_level="${JAS_DEBUG_LEVEL:-0}"
 if [ "$debug_level" -ge 1 ]; then
@@ -51,6 +53,22 @@ fi
 ###codec_selectors+=(jasper_vm)
 ###codec_selectors+=(vm_jasper)
 
+exclude_tests=()
+
+os="$("$sysinfo_program" -o)" || \
+  panic "cannot get OS information"
+echo "OS: $os"
+
+if [ "$os" = windows ]; then
+	eecho "WARNING: some tests disabled"
+	exclude_tests+=(sgn_1)
+fi
+
+base_opts=()
+for test in "${exclude_tests[@]}"; do
+	base_opts+=(-X "$test")
+done
+
 echo "STARTING AT `date`"
 
 num_errors=0
@@ -67,6 +85,7 @@ for codec_selector in "${codec_selectors[@]}"; do
 	opts+=(-e "$enc")
 	opts+=(-d "$dec")
 	opts+=(-E ignore)
+	opts+=("${base_opts[@]}")
 	#opts+=(-B)
 	opts+=("$@")
 	"$run_test" "${opts[@]}"