[chrishajer]

Looks like your host does not allow Options +MultiViews, or it conflicts with another .htaccess file, maybe the WordPress one?

Can you remove that line from your .htaccess and try adding explicit rules by accessing this URL for your site, then pasting those results into your .htaccess?

http://collectibleswow.com/collectibles-talk/bb-admin/rewrite-rules.php

(I think you need to be logged in as keymaster for that to work.)