Accelerometer Bug!

That's the proximity sensor issue, and yes, it's been discussed at length in a few threads here. Jobs and Co. mentioned that issue and will be coming up with a fix in a forthcoming software update.

 

I've heard "one or two" people have the problem you describe. It's the proximity sensor, not the accelerometer...

http://discussions.apple.com/thread.jspa?threadID=2475509&start=0&tstart=0

 

My iPhone 4 has always been bad about the proximity sensor, but I got the otterbox defender on it and I guess it aims the sensor better because I don't have any prox issue's anymore.

 

Should have a fix within a couple weeks.