HP LaserJet 1320 requires user intervention to print after Leopard

Ever since upgrading to Leopard, almost every single time I send a print job to my HP LaserJet 1320 (over the network, it actually connected to a PowerMac G5 in my office), it triggers an error warning (orange flashing light) on the printer. Pressing the main green print button lets the job print, but this is really annoying.

I checked and Apple recently posted a note about the HP LaserJet 1200 having a very similar problem except that an error page was printed after each job. The workaround they suggest for this doesn't work with the LaserJet 1320 problem, however.

A quick Google reveals at least one other Leopard using HP LaserJet 1320 owner is seeing a similar issue. And actually, as I composed this post, I found some 1320 owners in another Apple Discussion post about HP printer issues with Leopard. They suggested using the generic PostScript driver, but then I really like to have the ability to duplex.

Nothing in the /private/var/log/cups/error_log file of note as far as I can tell.

Any ideas? Any other people out there experiencing this problem who might have a solution (other than switching to a generic postscript driver)?