Do a battery pull. If still nothing, than it's probly the sensor in that part of the screen. If that's the case you'll have to exchange it out. Most likely it's a software glitch and a battery pull will fix.
Honestly, it almost sounds like your berry is having trouble "clicking". I know mine is pretty tough in the bottom left. It seems like some peoples have a new mechanism that registers clicks around the corners easier. I intend on checking some display models in stores this week to compare.
I think I will. I don't want to run into any more issues. Since the new phones won't be shipping til' December, they should order me one and they will do the swap once it comes in correct?
More phones will roll in next week. Don't believe the BS you were told on Friday. There is stock... always has been. Places around me are getting more in Monday and Wednesday.