Index: node_gallery.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/node_gallery/node_gallery.module,v
retrieving revision 1.17.4.18
diff -u -r1.17.4.18 node_gallery.module
--- node_gallery.module	4 Nov 2009 09:54:29 -0000	1.17.4.18
+++ node_gallery.module	19 Nov 2009 21:18:30 -0000
@@ -516,6 +516,9 @@
 }
 
 function node_gallery_gallery_to_arg($arg) {
+  if (! is_numeric($arg)) {
+  	return $arg;
+  }
   $types = node_gallery_get_types('all');
   $nid = $arg;
   $node = node_load($nid);