[xwiki-users] Problems with Facebook like Button

I have a Facebook like Button on my xwiki instance. When clicking on the button in facebook the following link is created: http://<mywiki>/bin/view/Main/Sample?fb_action_ids=22334241213413241&fb_action_types=og.likes&fb_source=feed_opengraph&action_object_map={%22334241213413241%22%3A211180592403908}&action_type_map={%22334241213413241%22%3A%22og.likes%22}&action_ref_map=[] However XWiki can not handle this link correctly. When clicking on it I get the following error message (it's in german language): How can I solve this problem? Regards Richard