This is a reach, but how many people with light bleeding are using a smart cover? At least with TVs, I know magnets cause that over time. Maybe since they're strong magnets, it's happening more quickly. I didn't have any on day one, but a little bit is developing on the bottom left. Right where the magnet is.
I noticed the light bleed right out of the box before using the smart cover. Mine isn't as bas as others, but the edge next to the Home button is the issue on my iPad 2 Wifi 32GB. Noticeable when viewing dark screen and I can see the slight discoloration caused by light bleed even when it's not dark.
This isn't a huge deal to me, but I did spend $600 on something I would hope wouldn't have light bleed. I mean, I had the first version of BlackBerry Storm and it had horrible light bleed. Don't expect this from Apple.