Really? I have never seen this brought up on MacRumors at all. That was the first I ever heard of it when I went to that website. If my iPhone 4 did that constantly, I would take it back in a heartbeat.
You should read more. The internet is big world.
Short of actually upgrading to the iPhone 4, I've already gone through 2 new 3GS iPs. Not the phone, it's the iOS. Until Apple chimes in on this, it's the only rational explanation for the issues.