Has anyone else noticed their battery not lasting anywhere near as long, after upgrading to 4.2.1 ? I fully charged my ipad last night (overnight) and I have been using it for about 2 hours now, light reading and web browsing, and my battery already is at 52%. I used to get days worth of general use from my ipad, but since upgrading to 4.2.1, I notice that the battery is not lasting anywhere near as long. Could it be to do with multitasking ? the fact that most apps are staying open in the background ? Anyone else had similar experiences ?