I have this weird issue. I have enabled permalink in my config.php. Initially I had the .htaccess with option +multiview in the /bbpress folder. Then I read that it would be good to have just one .htaccess in the wordpress folder. I did this and also tried to have the other option as documented in the site (using a generated list as content for .htaccess).
Permalinks worked when I am not logged in. The moment I log in as admin, I see the address is of the form ?/topic=1 etc.
I try clearing cookies, tried to delete the whole forum but still am able to reproduce the issue.
What am I doing wrong?