Every time I run bitcoin, my wireless connection crashes. I have a USB wireless key fob. What I have found is that I have to pull it out and stick it back in to reset it, and my wireless comes back on. All other internet connections work when I don't run bitcoin. When I play StarCraft online it works. When I surf the net or run mining software (poclbm's version) my wireless connection works.
However, when I start up the bitcoin client after a few minutes the wireless connection fails. Weird. I am wondering if it has to do with all of those connections.