Since some releases of the Tor Browser Bundle 2.x the control ports for Tor relays and the Tor Browser Bundle are different. The socks port is different, too.
There should be no problems with running a Tor relay (or bridge) while using TBBTor Browser Bundle for browsing.
Tor Browser BundleThe 3.x is still in alpha and will get ridseries of Tor Browser Bundle has Vidalia entirely,replaced with Tor Launcher so that there willshould be no conflict eitherproblems there.