People on Apple Insider are saying that it is almost impossoble to get a Zero Backlight Leakage screen. There will always be some amount of Bleeding in all the screens no matter whatever you do ? Now, I dont know who to believe ?
I think their assessment is a true one, especially if the light bleed is only visible when the brightness is higher than your normal level, and you can only see it in a dark room. IOW you gave to go looking for it. IMO , if you cannot see it at the normal brightness level in normal viewing conditions, then it's not really a issue is it?
If I turn the brighness up on my ipad 3 in a blackened room I can see a touch of minor bleed in 3 places along one side when viewed on black screen.
However, I'm unlikely ever going to be watching anything with the brightness set up that high, secondly, am I going to be viewing my iPad in a blacked out room... I think not!, I've checked on dark films and black area's at normal viewing conditions, and it's fine.. no probs at all.
For curiousity I did check my iPad-1 for light bleed yesterday and was very surprised indeed to find it had worse light bleed than my new one does..lol, and yet even though I've had it for 18mths I never noticed anything amiss. IOW dont look for problems you cannot see, and in some cases did'nt even know what they were until you read it on here..lol
Conclusion.
IMO, if you have to up the brightness and view it in a darkened room to make the backlight bleed visible then it's just not worth worrying about, as it will be fine under normal conditions, but if it really is noticable at all under normal viewing on dark area's then definately get it changed, I just got mine changed because it had a spec of dust under the screen, which was visible on white or light grey screens, it was visible in normal use so it was change.
Ironically my 1st one had no light bleed at all.. but is it worth changing again for something I don't even see under normal use.. nah.. i don't think so.
TBH I doubt there is such a thing as a 100% perfect iPad3 or a perfect anything for that matter... except my wife..lol (in case she read this..lol)