I'm using the standard wiki module on a 1.7+ installation. The wiki with this problem is in group mode without groups. At first everything was OK, but after a few editions by students the wiki has become invisible.
However, even though the "view" tab shows nothing, when you click on the "edit" tab the content is just there! I couldn't find a similar case in the forums.
What might have happened? Any help welcome. Thank you for your attention.