I downloaded and installed the new update last night... from 4.2 to 4.5. The installation completed with no problems, but when I load iTunes, I get the following message from the "iTunes Setup Assistant." Warning! iTunes drivers for importing and burning CDs and DVDs cannot be found. Please reinstall iTunes or restart your system. I've done both reinstalling and rebooting but I still get the same message. When I get out of the message iTunes loads up to v4.2, which I think is strange since the installer removed that version first. I'm about to uninstall 4.2 altogether and try a fresh install of 4.5, but I'd rather not do that just because I'll have to redo my music library. I've made no changes otherwise as far as I know... this should be a simple upgrade.