9: Skipping updates: some must be skipped.
Yes, generally I am up-to-date on updates. BUT, if I see anything remotely to do with nVidia is the listing of updates, I skip it. Why, in 99% of cases any major updates and most definitely ALL upgrades will completely mess up my video settings, never to be got back correctly at all. There will forever be missing RANDR and such like. This is my experience under Ubuntu since Gutsy.