Mine recently starting acting funky and strange but not as you describe. It was almost as if a magnet was pulling some of the pixels and causing distortion of colors. It also seemed to freeze up my camera really strange like.. I removed PRO HDR which is a cam app I recently updated and did a reboot and now it's fine. You try a back up/wipe/restore yet?
Galaxy Nexus Verizon (rooted/stock)
Kindle Fire HD 8.9" (stock)
HP TouchPad (CM9/ICS)
iPad2 (debating jailbreak)
[Retired] HTC "OG" Thunderbolt - Droid X - Touch Pro2 - Touch Pro1 - Samsungi760