I just played a lengthy game of Left 4 Dead over Xbox Live with fun, faulty voice chat. One person had something quasi-functioning, but the volume was so low, it might as well have been random mumbling. The others of us had headsets that apparently no longer functioned, providing neither incoming or outgoing audio. We soldiered through with no communication, eventually resorting to a combination of XBL voice chat and a cell phone conference call.

Did we have busted mics? No. Voice chat worked perfectly fine on the dashboard. If this is a L4D bug, it’s pretty significant. The game is all about teamwork and communication.