Photoshop CS3 crashing on new doc

Just upgraded from CS2 to CS3 web premium (PC vers)!.. With all my excitement whilst downloading the 2gb download, and the 1 hour installation process I was dying to try out the new apps..

Then to my horror, open Photoshop and bang crash wallop, the whole app dies. Hmm, maybe a reboot will fix but no, still dies.

Then.. get this, I changed my default printer to Adobe Pdf and it works.