Btw, I did a quick look for something about this in Apple support but didn't see anything yet. I have a padded case for it because I transport it back and forth to work everyday in my backpack. Don't think anything in use or transport has changed in the last 24 hours so I'm trying to discern a cause for the video problem. Anyone know if Techtool has shipped the upgrade yet. I paid for it at MacWorld and think I got one email back in June saying they still weren't shipping but nothing since then... )-: Also, please cc me as I'm on digest mode. Thanks for any/all suggestions or info. I do LOTS of graphics stuff on my 15" Ti and this color shift is painful. Cheers, Jenn