Index: filter.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/filter/filter.module,v
retrieving revision 1.204
diff -u -r1.204 filter.module
--- filter.module	21 Jan 2008 15:08:24 -0000	1.204
+++ filter.module	24 Feb 2008 22:31:58 -0000
@@ -900,7 +900,7 @@
       $chunk = preg_replace('!(<'. $block .'[^>]*>)!', "\n$1", $chunk); // Space things out a little
       $chunk = preg_replace('!(</'. $block .'>)!', "$1\n\n", $chunk); // Space things out a little
       $chunk = preg_replace("/\n\n+/", "\n\n", $chunk); // take care of duplicates
-      $chunk = preg_replace('/\n?(.+?)(?:\n\s*\n|\z)/s', "<p>$1</p>\n", $chunk); // make paragraphs, including one at the end
+      $chunk = preg_replace('!/\n?(.+?)(?:\n\s*\n|\z)/s!', "<p>$1</p>\n", $chunk); // make paragraphs, including one at the end
       $chunk = preg_replace('|<p>\s*</p>\n|', '', $chunk); // under certain strange conditions it could create a P of entirely whitespace
       $chunk = preg_replace("|<p>(<li.+?)</p>|", "$1", $chunk); // problem with nested lists
       $chunk = preg_replace('|<p><blockquote([^>]*)>|i', "<blockquote$1><p>", $chunk);