diff -r b38afb86dcad -r f6ca7cead82c plugins/gallery/sidebar.php
--- a/plugins/gallery/sidebar.php	Thu Aug 09 12:34:39 2007 -0400
+++ b/plugins/gallery/sidebar.php	Wed Nov 21 15:22:13 2007 -0500
@@ -38,7 +38,7 @@
     $rand = array_rand($images);
     $image = $images[$rand];
     $acl = $session->fetch_page_acl(strval($rand), 'Gallery');
-    if ( $acl->get_permissions('read') )
+    if ( is_object($acl) && $acl->get_permissions('read') )
     {
       $my_image = $image;
       break;