Comment 4 for bug 1016854

I am running Ubuntu 12.04 (AMD 64 Bit) and with all the updates installed without using any unofficial PPAs so Unity should be the latest one. I have a Nvidia Chipset GM8500. Once i get the above mentioned problem i got to log out and log in back again. I have to save my work and log out and log in which is really frustrating. Let me know if you need more info.Precisely the Desktop just goes out of the screen boundaries when i lock the screen and unlock it after some time.