Json clients using non menu mode get no response for menu items with coderefs as urls as json serialisation breaks.  This is common with the new browse menu interface and plugins which do this.  Seen by iPeng with plugins, but its a general case and there is no value in sending coderefs in the response, so they should be screened out.

Propose:
--- Slim/Control/XMLBrowser.pm  (revision 33279)
+++ Slim/Control/XMLBrowser.pm  (working copy)
@@ -1326,9 +1326,13 @@
                                                $hash{name}  = $name          if defined $name;
                                                $hash{type}  = $item->{type}  if defined $item->{type};
                                                $hash{title} = $item->{title} if defined $item->{title};
-                                               $hash{url}   = $item->{url}   if $want_url && defined $item->{url};
                                                $hash{image} = $item->{image} if defined $item->{image};
-
+
+                                               # add url entries if requested unless they are coderefs as this breaks serialisation
+                                               if ($want_url && defined $item->{url} && (!ref $item->{url} || ref $item->{url} ne 'CODE')) {
+                                                       $hash{url} = $item->{url};
+                                               }
+
                                                $hash{isaudio} = defined(hasAudio($item)) + 0;
 
                                                # Bug 7684, set hasitems to 1 if any of the following are true: