=== modified file 'uc_catalog/uc_catalog.module'
--- uc_catalog/uc_catalog.module	2009-01-30 21:07:24 +0000
+++ uc_catalog/uc_catalog.module	2009-02-16 18:42:56 +0000
@@ -409,7 +409,7 @@
             }
 
             // Now, create a structured menu, separate from Drupal's menu.
-            $content .= theme('uc_catalog_block', $menu_tree);
+            $content = theme('uc_catalog_block', $menu_tree);
 
             $subject = variable_get('uc_catalog_name', t('Catalog'));
             if (variable_get('uc_catalog_block_title', FALSE)) {