By adding and using HP6500 Officejet drivers instead of the 7300 it seemed to
work. We connected the printer directly to the computer using a USB cable
and noting it in the properties menu. We don't know if there are any
features we may have lost in doing this however, the correct duplex format is
more important to us right now. Incidently, this was the direction HP told
us to go from their on-line tech support.

"Alistair Doran [1009382]" wrote:

Both on 64bit Vista and 32bit Vista PC's the HT OfficeJet 7310 All-In-One
native drives are working incorrectly when I print in duplex (which is
usually all the time!). Instead of the printer printing in book format it
keeps printing in "flip up format" on matter setting I pick.

Has anyone else had this problem and managed to solve apart from doing
manual duplex printing?

Alistair