Its a "depends how hard you press" deal.
If i press like its a new born baby trying to not wake up it, i see nothing happen.
if i press in a regular way, i find the problem most common on the volume buttons, as you are pressing the side basically into the LCD screen.

Ive also known the top of my screen to go white where ive have pulled it out of the holster. as the only way to pull it out is obv. to hold the screen; its just part and parcel of what happens in the daily life of the bold.