My one month old 32gb IPhone 4 has worked perfectly up until now. Now it either brings up the "slide to power off" screen, as if the power button was depressed for 5 seconds. Which it wasn't. Or the screen goes black as if the power button has been pressed momentarily, again, it was not. Just in typing this, it has happened twice... I'm sure it will involvema visit to the Apple store, but hope there is a quick fix.