Comment 1 for bug 856314

I'm having what may be a related problem. I frequently can't connect with my broadcom 4313, and when connected the internet essentially doesn't work. This also did not occur on previous Ubuntu versions or on a Windows install.

I think this qualifies as a high-priority issue, as it's a total show-stopper for anyone with a broadcom 4313 card (see this thread: http://ubuntuforums.org/showthread.php?t=1840519), and there are a fair number of them.

I hope this gets fixed soon, as I'm forced to use Windows on my netbook in the interim.