Vista - Fix for Duplex printing on HP 1320 printer under Vista

When Vista pushed a new 1320 PCL 5 driver to me a month or two ago, it broke duplexing (printing on both sides automatically).

I discovered that I had to manually tell the driver that my 1320 had the duplexing capability as follows:

Control Panel (classic View) / Printers /
hp LaserJet 1320 PCL 5 / Right click on Properties /
Device Settings / Installable Options /
Duplex Unit (for 2 sided printing) /
Use the pulldown to change from "Not installed" to "Installed".

Then it was just a matter of enabling two sided printing as normal:
Control Panel (classic View) / Printers /
hp LaserJet 1320 PCL 5 / Right click on Printing Preferences /
Finishing / Check the Print On both sides checkbox

And now it's duplexing again. BTW, I also had the multiple copy problem in the past, and that automagically resolved itself when Vista pushed a fixed driver a while back.

Hope this helps!