I just upgraded my 15" late-2006 MacBook Pro's HD yesterday (dropped in a 320 GB) so that I could install a few OSes onto the main drive (2 OS X, 1 Windows). Today, I installed the Windows 7 Beta, which went well, except for what I originally thought was a weird Windows glitch. During this install process, the colors onscreen shifted randomly, where colors were substituted for other colors randomly (that's the best description I've got). I though it was OK when Windows 7 booted completely and looked fine. However, on restart, I noticed the same color issue on the startup disk selection screen, then saw it at the login screen. I've included a little shot from my phone of the issue: http://flickr.com/photos/insomaniac117/3225535079/ So, oddly enough, the output on my external LCD (attached via DVI) is fine, free of the color problem (I'm using it right now to type, since the main display is useless). I had originally thought this to be an issue with the ATI chip (a Radeon X1600), but seeing as how the main display works, something else seems to be up. Is it possible that I bumped something while installing the HD? Could it be a software issue?