--- node_import.inc	2011-04-22 02:19:38.000000000 +0800
+++ node_import.inc.patched	2012-07-04 15:09:34.685850362 +0800
@@ -1581,8 +1581,9 @@
       $parts = array_filter(explode('/', $path));
       $path = '';
       while (!empty($parts)) {
-        $path .= array_shift($parts) . '/';
-        file_check_directory(file_create_path($path), FILE_CREATE_DIRECTORY, 'node_import:directory');
+        (string) $path .= array_shift($parts) . '/';
+        $import_dir = file_create_path($path);
+        file_check_directory($import_dir, FILE_CREATE_DIRECTORY, 'node_import:directory');
       }
     }