--- loncom/homework/grades.pm	2010/04/22 13:00:24	1.630
+++ loncom/homework/grades.pm	2010/04/25 13:18:32	1.631
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # The LON-CAPA Grading handler
 #
-# $Id: grades.pm,v 1.630 2010/04/22 13:00:24 www Exp $
+# $Id: grades.pm,v 1.631 2010/04/25 13:18:32 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -2344,7 +2344,7 @@ sub check_collaborators {
 	    (split(/[,;\s]+/,$record->{'resource.'.$part.'.collaborators'})) { 
 	    $possible_collaborator =~ s/[\$\^\(\)]//g;
 	    next if ($possible_collaborator eq '');
-	    my ($co_name,$co_dom) = split(/\@|:/,$possible_collaborator);
+	    my ($co_name,$co_dom) = split(/:/,$possible_collaborator);
 	    $co_dom = $udom if (! defined($co_dom) || $co_dom =~ /^domain$/i);
 	    next if ($co_name eq $uname && $co_dom eq $udom);
 	    # Doing this grep allows 'fuzzy' specification