Index: date_api.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/date/date_api.module,v
retrieving revision 1.44.2.11
diff -u -r1.44.2.11 date_api.module
--- date_api.module	17 Apr 2008 16:45:19 -0000	1.44.2.11
+++ date_api.module	18 Apr 2008 20:30:37 -0000
@@ -1102,7 +1102,8 @@
  */
 function date_limit_format($format, $granularity) {
   // Strip out timezone formatting.
-  $regex = array('([OZPe])');
+  //$regex = array('([OZP])');
+  $regex = array('((?<!\\\\)[OZPe])');
   // Get rid of dash separating date and time if either is missing.
   if (!date_has_time($granularity)
     || sizeof(array_intersect($granularity, array('year', 'month', 'day')) == 0)) {
@@ -1124,13 +1125,13 @@
         $regex[] = '([\-/\.]?[FMmn][\-/\.,]?)';
         break;
       case 'hour':
-        $regex[] = '([HhGg][:]?)';
+        $regex[] = '((?<!\\\\)[HhGg][:]?)';
         break;
       case 'minute':
-        $regex[] = '([:]?[i])';
+        $regex[] = '([:]?(?<!\\\\)[i])';
         break;
       case 'second':
-        $regex[] = '([:]?[s])';
+        $regex[] = '([:]?(?<!\\\\)[s])';
         break;
     }
   }