AD/OD Integration-Bypassing Print Authentication on Mac OSX Clients

Hello, I work for a public school district with 2008 Active Directory server managing authentication, file sharing and printing. We also have a 10.5.8 OD server bound to the AD server which is used to manage preferences for the Mac clients. When attempting to print for the first time to a new printer, Mac clients are always asked to authenticate to the domain, while Windows clients are not. This is incredibly annoying to say the least. The user can save the credentials in the keychain to cease further authentication requests but that entail the school tech to touch the machines, which is a PITA. We do have some scripts to add all groups to the lpadmin group to allow all users to add and delete printers w/o authentication. We'd really like to find a way to bypass authentication for printing as well. Our IT admin says it's an issue with CUPS and single sign-on (or lack thereof) in OSX. Has anybody successfully dealt with this? Thanks, John