[ubuntu] What's wrong with my screen?

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http://ubuntuforums.org – I'm having lots of issues with 12.10. For starters, after 1.5-2 days of running without a restart, my screen looks like this: Attachment 230088 To be honest, I'm not happy with 12.10 at all. The webapps seems to be running all the time. Chromium eats up RAM too easily. The OS seems to be eating up 1.5 GB of RAM minimum. I expect that from Windows, but this is insane from Ubuntu. So, I'm trying to fix one bug at a time. Starting with whatever eventually causes the screen to go buggy. As far as I can tell, I'm running the correct video drivers for my card. It's a Dell Inspiron 1545 (Hardware)