My new macbook 7200rpm hard drive that I had upgraded to some time ago, died suddenly. Luckily I had the original drive with a full and quite recent system backup on it.
I put the "spare" drive back into my mac. The only thing that is different now when running from it is that Firefox displays non-smoothed fonts on some sites, ie. the google ads here on MacNN forums are pixelated (along with "Ads by Google").
System settings are "turn off font smoothing for sizes 6px and smaller". I tried 4px, but it didn't work either. I removed Firefox completely (with all settings), reinstalled - the problem remains. Strangely, only Firefox seems to be affected - Safari, Opera, Camino work properly.
Any hints?..