Index: branches/release-41/lib/MT/Template/ContextHandlers.pm
===================================================================
--- branches/release-41/lib/MT/Template/ContextHandlers.pm (revision 2654)
+++ branches/release-41/lib/MT/Template/ContextHandlers.pm (revision 2656)
@@ -11105,5 +11105,7 @@
     my ($ctx) = @_;
     my $a = $ctx->stash('commenter');
-    return $a ? $a->nickname || '' : '';
+    my $name = $a ? $a->nickname || '' : '';
+    $name = _hdlr_comment_author($ctx) unless $name;
+    return $name;
 }