I've only had my iPad2 for 2 days, but am observing significant differences in the way auto-brighness works compared to my iPad1, which I have had since launch. Both are 4.3.3 (and trust me the jailbreak status is irrelevant, as I observed this immediatley from powering on my new device). In normal lighiting (office / home), my iPad2 is basically on full brighntess (due to auto brighness) all the way down the brighness slider until about 55-60%, then it starts to reduce. Of course if I turn off auto-brighness, then the slider works across the full range as expected. On the iPad1, the effect of auto-brighness is not very much. Maybe + and - 10% of whatever level you have it at, and it makes a good assessment of the ambient light. On my iPad2 is just seems to be maxing out the brighness most of the time as if it believes it is very very bright in terms of ambient light all the time. Anyone else make this overservation too, or do I have a dodgy sensor? I thouhgt I'd seen another thread a while ago which was similar, but I can't find it, and didn't really contribute then because I didn't have an iPad2 at the time.