For some reason my iphone seems to have a delay in the screen wake up when its in standby. this seemed to have started after 3.1 update. What is weird is when the phone is plugged into the charger and i try to wake it up the screen changes instantly. While its running on the battery it takes like a 2-3second delay. Also, if i wake the phone up. then put it in standby then try to wake it up like 2 seconds after the wake up is instant no delay. But if i wake the phone up, then put it to standby and leave it be for 5minutes or so then it shows the delay of 3seconds before the screen turns on. I highly doubt it my home button as when im in a application and want to close it as soon as i hit the home button it closes the APP. Anyone else have seen this issue?