Index: modules/filter/filter.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/filter/filter.module,v
retrieving revision 1.213
diff -u -p -r1.213 filter.module
--- modules/filter/filter.module	6 May 2008 12:18:47 -0000	1.213
+++ modules/filter/filter.module	11 Jun 2008 18:55:40 -0000
@@ -751,10 +751,10 @@ function _filter_htmlcorrector($text) {
   }
 
   // Properly entify angles.
-  $text = preg_replace('!<([^a-zA-Z/])!', '&lt;\1', $text);
+  $text = preg_replace('@<([^a-zA-Z/!])@', '&lt;\1', $text);
 
   // Split tags from text.
-  $split = preg_split('/<([^>]+?)>/', $text, -1, PREG_SPLIT_DELIM_CAPTURE);
+  $split = preg_split('/<([^>!]+?)>/', $text, -1, PREG_SPLIT_DELIM_CAPTURE);
   // Note: PHP ensures the array consists of alternating delimiters and literals
   // and begins and ends with a literal (inserting $null as required).