I get the same problem with 2.0.7.
Tried over two days, and the issues I'm having are the same as above. Log out, link into a forum, and get a 404.
I am running mod_rewrite from a virtual conf file, and do some other rewrites in a custom compiled apache. I commented out all other rewrites, and still get the 404 error.
Here's a sample error from my log files, and just so happened that google hit it at the same time:
Code:172.16.225.55 - - [13/Sep/2004:10:01:18 -0700] "GET /forum-8.html HTTP/1.1" 404 10132 "http://www.myforum_dot_com/index.php" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)"
64.68.83.228 - - [13/Sep/2004:10:01:19 -0700] "GET /forum-8.html HTTP/1.1" 404 10133 "-" "Mediapartners-Google/2.1"
64.68.83.228 - - [13/Sep/2004:10:01:20 -0700] "GET /forum-8.html HTTP/1.1" 404 10133 "-" "Mediapartners-Google/2.1"
172.16.225.55 - - [13/Sep/2004:10:01:21 -0700] "GET /forum-2.html HTTP/1.1" 404 10132 "http://www.myforum_dot_com/index.php" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)"