Backlight bleeding. users (some with YouTube accounts) have experienced a problem with the edges of their LCD screen showing a lot of extra light from sides of the screen.
Bonding blotches. Many users have documented yellow blotches on their iPad 2 screens. Apple usese a bonding agent called Organofunctional Silane Z-6011 to bond the layers of glass similar to iPhone 4. “Apparently, Apple (or more likely Foxconn) is shipping these products so quickly that the evaporation process is not complete”
Dead Pixel problems. Users have gone through as many as four iPads and still had problems like dead pixels.
Speakers (Wide range speakers located on the back of the unit the speaker seems to get stuck in headphone mode)