I just upgraded recently to quantal and all of a sudden I get these lines of pixels all throughout my open windows. I am absolute beginner to ubuntu, I use it just for internet and downloading so dont know many commands and such. I didnt like the home screen how all the icons were lined up on the left so I did search and found something to change it back to the oneiric way where I logoff and switch to "gnome" or something like that so im not sure if this is what caused it but attached in a picture of it
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