I have not found a permanent solution to this problem but one thing that seems to help is to go into c:\program files\microsoft office\office12 and delete EXCEL.EXE
Once you launch Excel again from the start menu (the shortcut from quick launch will not work (if applicable) as it is pointing to the program you just deleted) - you will see Excel install and voila! no more issues with print preview.
However, I have one user who has seen this problem return and I have completely removed office and added it back previously. I am not sure what the final fix is for this, but the above serves as a temporary solution.