[livibetter]

About MultiViews, I recently re-read FAQ. There is a note for not working MultiViews.

3. Try it out. If it doesn’t work, your web server does not support MultiViews. Instead, you’ll need to remove that line from your .htaccess file and replace it with the several lines bbPress generates for you when you browse to your bbPress installation’s /bb-admin/rewrite-rules.php.

Maybe you can try it and let us know if that works?