Comment 49 for bug 283811

"So we now have a better workaround than before, for people NOT USING Windows or SAMBA (using CUPS shared printer):
1) Open System/Administration/Printing and note the name of the printer in the newly open window.
2) Open a terminal window (Applications/Accessories/Terminal) with your main(admin) user, and type in:
lpadmin -p <printer_name> -o auth-info-required=none
where <printer_name> is replaced by name of the printer you noted in step 1.
I believe the 3D after = was a copy/paste 'bug'."

I have tried this & it did not correct the issue.

I have also tried, now, to print via my network while operating in XP to my printer host PC when it was operating in Ubuntu 9.04 - it fails, prompting for the same password as it does the printer PC is in Ubuntu 9.04.

As a test, I moved the printer to our 3rd PC which is ONLY Ubuntu 9.04 - No XP, no dual boot; just Ubuntu 9.04. I can "see" & connect to it but it fails to print; no matter if I'm working in Ubuntu 9.04 or XP. BTW, this same Ubuntu 9.04 only PC has the same issues as I do trying to print via the network to the printer host PC.

As Paul said & others as well elsewhere on the internet, some have had success with workarounds where I have not. Could this be some combination of downloaded software that is causing this? If all my PCs are running Ubuntu 9.04 do I need Samba to share printers & files?
And, so it goes.