HP LaserJet 4650 and Leopard

Question

After I upgraded to Leopard, I haven't been able to print to my HP Color LaserJet 4650dn. It's connected via network (TCP/IP) and it used to work fine up through OS 10.4.x.
I downloaded the latest driver from HP (v5.5.2.051). I deleted and reinstalled the printer using the Mac Printer and Fax utility. However, I encounter a couple of trouble signs:
1. After I enter the IP address and try to select a printer, I choose the "Select a driver to use..." option, which doesn't allow me to choose from the list on the first try. Instead, it searches for a few seconds, then defaults to "Auto Select". On the second try, I am able to select the driver for the HP Color LaserJet 4650dn.
2. When I select the driver for that printer, I get a message that says: "Some of the software for the printer is missing." "You may not be able to print to “HP Color LaserJet 4650”. Please reinstall the printer’s software."
I've re-installed the driver a couple of times, but no success.
When I try to print, the printer shows up in the print dialog box, and it appears to process the job through the Mac print utility, but nothing ever prints.
I've sent an inquiry to HP, but haven't heard anything back yet. I though maybe someone out there had encountered the problem?
I also thought about uninstalling the HP drivers and trying to re-install, but I don't know where to find the files or folders I would need to delete.

Answer 1

I'm having the same problem with my wife's MacBook Pro. I've fixed it three or more times. It keeps coming back, and the same fix doesn't always work. My iMac, with the exact same configuration, has not had a problem since the first time. I have a (very old now) hp 4050dn connected to our LAN via ethernet through an Airport Express configured for relay.
Console logs always have two errors, one says that post processing failed, the other says something about a filter.
Test pages and files from Text Edit work, pdfs (from Acrobat or Preview) spool, but then the printer queue stops. Print jobs just pile up in the queue, but it's never one job holding the others up.
I've deleted and recreated the printer. I've uninstalled and reinstalled drivers, including the hp 1.1 driver update (reinstalling that always worked until this last time, when nothing seems to work). I've restarted CUPS via terminal {
cups disable
cups enable
I've restarted CUPs via terminal another way {
sudo killall cupsd
sudo cupsd
I've deleted and recreated print presets. I've reset the printer in the Systems Prefs Print and Fax pane. I've repaired permissions. I've probably done a bunch of other things, too. It's come back after a week or so every time, and this time, nothing is working. Bad news.