error in node.tpl.php

hi guys!
was starting to play with custom templates for diff. node types. for og templates i tried to use page.tpl.php, supplied with module. but when i tried to use it following error came up :

warning: Invalid argument supplied for foreach() in /home/mugu/public_html/includes/common.inc on line 1331.

i reported it here http://drupal.org/node/15467

i played around a little bit and saw that there is an error on following line:

            $og_links[] = l($node->og_groups_names[$ind], 'node/', $node->og_groups[$ind]);

alast to argument should be concatenated with dot, and not seperated by comma.

            $og_links[] = l($node->og_groups_names[$ind], 'node/'.$node->og_groups[$ind]);

after that everything works nice

:)