Ipad 1 icons disappear...

Hi all,

I have an Ipad 1... after an upgrade to IOS 5.1 suggested by the device, the icons turns to disappear from the desk, or, if you check the video @ ( https://rapidshare.com/files/3022793012/SAM_1126.MP4), or check the images attached at this message, sometimes if you swap your finger thru the screen, appear and disappear while you pass it.

I guess the issue starts with the upgrade, but I really dont know it this was the cause of the problem.

Anyone had the same issue? or if you know how to solve it, please let me know.

Thank you!
Pablo.
SAM-1121.JPG
SAM-1123.JPG
SAM-1124.JPG