Display a clear error message if entitytranslation is not updated

Hi,

first of thanks for this great module. Im having a very weird problem:

When I edit a node and change its metatag's at the bottom of the node/*/edit page it works fine. Changes are shown correctly in title and metatag's. But when I go to the same node/*/edit again, i get a totally empty page! No , no , simply nothing.

After disabling the metatag module i can edit the node again. but when i activate it, i cant.

Im using latest Drupal (7.22), Ctools(7.x-1.3) and Token(7.x-1.5).