Forum Invalid Forum specified, after upgrade to 4.0.2
 

Hi,

I just upgraded a testforum from 3.8.4 PL2 to 4.0.2. The CMS is disabled, the index.php is set to require forum.php.

On the forum homepage I cannot access a single forum, when you click on the link this message appears:

Quote:
Invalid Forum specified. If you followed a valid link, please notify the administrator

I changed the paths to the testforum, I reset the cookie settings, I even ran the tools.php plus all needed maintenance tools. I also did another upgrade performance. Still the same. However if you click e.g. on a last post icon you can access the according thread.

Any ideas how to fix that. And why this is happening (don't want this to happen when I upgrade my real forum).

Thanks a lot.