Index: includes/common.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/common.inc,v
retrieving revision 1.1254
diff -u -r1.1254 common.inc
--- includes/common.inc	14 Nov 2010 21:04:45 -0000	1.1254
+++ includes/common.inc	16 Nov 2010 21:02:29 -0000
@@ -6906,7 +6906,7 @@
 function drupal_explode_tags($tags) {
   // This regexp allows the following types of user input:
   // this, "somecompany, llc", "and ""this"" w,o.rks", foo bar
-  $regexp = '%(?:^|,\ *)("(?>[^"]*)(?>""[^"]* )*"|(?: [^",]*))%x';
+  $regexp = '%(?:^|,|、|，\ *)("(?>[^"]*)(?>""[^"]* )*"|(?: [^",|、|，]*))%xu';
   preg_match_all($regexp, $tags, $matches);
   $typed_tags = array_unique($matches[1]);