I don't see those options in CS3 but there is a box save 'Alpha Channels' which strips them out when unchecked. I must have used that box a zillion times nd never noticed!
Attached are a couple of screen snaps that show the option box when saving as a TIFF, and the second shot is of the box that you see when saving as a PSD.
You can see the options for the TIFF and in case you save as a PSD, you must have that check in the Max Compatibility box.
Alpha channels are a NO-NO.
Hope you have it working.
Fred