the module assumes that the group type doesn't containt "_"

In function og_limit_form_alter(&$form, $form_state, $form_id), we have the following line:

list($type, $form_name) = explode('_', $form_id, 2);

This will fail if the group type (which is used to create the form_id) includes an underscore (for example if the type is called "my_group").

There should be a better way to extract the information.