I originally thought this was a side effect of my 8600M GT failing, but the video card has been replaced and this problem is still occurring. I attached a screenshot of what top sites looks like for me whenever i open a new tab while the current tab is zooming in to a top site after i click on one. if i wait for the end of the zoom in graphic effect, then i don't have any problems. After replacing the whole logic board, the genius bar reps have come to the conclusion that this must be a software issue. I'd like to avoid a complete reinstall (already tried an archive install), so if you have any ideas what might possibly be causing this problem please help! Whenever this error occurs, the console reads: 6/7/10 11:51:05 PM [0x0-0x23023].com.apple.Safari Mon Jun 7 23:51:05 david-corens-macbook-pro-2.local Safari <Error>: unknown error code: invalid drawable i dont have much of an idea what any of that means. Thank you for any advice or tips!!!!!