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I have a graphics issue in Ubuntu 12.10. I'm running a 3-year-old Lenovo Thinkpad SL510. After some usage time, the desktop becomes weirdly distorted, with black lines showing on the right side. Here is an image of this issue:

Distorted desktop

I'm not sure if this can be seen here, but the entire background has thin lines shifted so the image looks distorted. A similar issue appears sometimes on the launcher, where the hovering text looks like this:

enter image description here

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