I am having the same issue with Oxygen. You can see it here:
http://englishintirol.com/ESiT/full-width-test/
Tried the ‘.bbp-forums .hentry . . . ‘ as suggested above, tried playing with a variety of table settings, with no result. I’ve looked in Safari Web Inspector which suggests it could be in bbpress.css, tried playing around with bbpress.css as a result, also with no joy. Any help would be appreciated.
