I don't know where post this, but I'm getting since yesterday a weird behavior in OS X Snow Leopard. I don't know if is related to XCode/iPhone SDK or what. Sometimes, with no apparent reason, the menu of the application become FULL white. Then in the emulator I get distortions in controls (the edit not show characters when input, but the control are getting it). Also I lost the Command-Z in the xcode editor. Other glitches are around but I don't remember it right now. I have a white macbook MacBook2,1.