lpadmin error when trying to print in OS X 10.5

This is a known issue in OS X 10.5.7, and Apple has a support article with the supposed workaround. Trying to login as the lpadmin fails, and I'm sure if you found this article you're frustrated with trying to figure out which password you should be using. The trick is to upgrade the lpadmin group to support GUID membership. To do that, you can use a terminal command while logged in as a local administrator.

1. Go to Applications->Utilities->Terminal

2. Enter the command dseditgroup -o edit -p -a admin -t group _lpadmin and then press Enter

3. You should get a response saying _lpadmin has been upgraded to support GUID membership.

Try printing now and it should be fine. To see the Apple support page, check article TS2754

PS - I have seen this only act as a temporary fix on a few Macs that I have setup to connect to Active Directory. I'm not sure why, so if you run across this and can explain why this works for some AD Macs but not all (as a permanent fix), please leave a comment. Thanks!