Since enjoying an original iPad , ipad2 and now my new iPad, not to mention my intention to buy nothing until ip5 is here but anyway, Until my new iPad I never seemed to notice my device stays awake unless I put it down in mid application. If I walk away from it after closing an application or all of them my homepage stays on ( illuminated ). I do not remember ever having to operate the power button at anytime after putting any other iPad down to rest. They just blacked out. My New iPad, the third replacement device I have taken home do not. Technically I have since March16 , launch day. After receiving the new iPad on the 19 th , I have had 4 devices. Replacement after replacement for different issues obviously. Wifi , headphone jack hardware , etc. and yes, I always forget to bring this point up at the Genius Bar. Unbelievable ! is there a problem with this current device ? It does not auto sleep , if I leave it at my homepage. It only auto sleeps if I put it down with an application running. Thanks. It's just that Ido not remember ever having to shut any prior device off manually. Just to sleep , not completely off. Thanks again.