Forum 0.2.1 which works with 2.3.3 has just been released - http://www.silverstripe.org/forum-module/
I apparently am having a problem different than the others. When I have the forum module installed (even the new 0.2.1 release) everything appears to be fine UNTIL someone tries to actually post a thread. At this point it redirects the user to the login page, even if they were already logged in, in an infinite loop. It does not matter what already created user account is attempted, the login screen is always reloaded. After being redirected to the login page it appears that the currently logged in user is logged out. (Could be that the cookie is trashed.) Any suggestions?
I have a similar problem, I have SS 2.3.3 and forum module 0.2.1 installed and when I'm trying to view a new thread, I've got this error on my developer page:
This page contains the following errors:
error on line 150 at column 105: EntityRef: expecting ';'
Below is a rendering of the page up to the first error.
Wtf?! Strange things going on here, it works, but I've only changed some css things?!
So you can ignore my last post, sorry for unnecessary posts.