My 16GB iPad Wi-Fi model I recently purchased began to exhibit a clicking sound near the top left hand corner of the screen (if held in portrait mode). I noticed this when I was playing a racing game in landscape mode with the sound off. When I would press the break button, I noticed a clicking sound on the screen. There are a few inches around that area that it happens. The sound is not loud, but it is there. I took my hard case off the iPad to make sure it wasn't the case and it isn't. I haven't noticed any problems really around the bezel edges or anything on the screen itself. Any idea what this is or if its a problem I shouldn't worry about? Thanks!