I installed the final release, today, and I'm still getting a 404 error when I try to post a new topic to groups. Any ideas why?

The path looks like:
http://implantintel.com/groups/orca/forum/
Cosmetic-Enhancement-0.htm#action=goto&
new_topic=Cosmetic-Enhancement

I know that's incorrect, but can not find a solution, and the whole issue is just driving me crrrazy!