Hi, I've had my iPhone 3G for about 3 weeks now. Ever since last night, it's been trying to shut itself off, like when you HOLD the top sleep/power button off. I will be either text messaging or reading email and it will first go to sleep, then it will try to turn itself off, but doesn't because you have to swipe the slider. I have a case, and the case is NOT hitting the button. I've already tried to turn the power on and off to restart it and it's still having this issue. Anyone else have this problem, and were you able to fix it? I'm thinking about going to the apple store today if I can't figure it out today. Thanks ahead of time for your input.