Migrating to new PS 4.0 server from Metaframe XP, users on new server are now mapping local printers, in the Citrix XenApp / Presentation Server forum on BrianMadden.com

This is a complicated one, hopefully somebody can think of something I've missed.

We have a published app on an ancient Windows 2000 / Metaframe XP server that we have migrated to a less ancient PS 4.0 / Windows 2003 server. We are moving the users this weekend. Both servers have local network printers mapped and on the old server, some users can map their client printers while others cannot. This is the desired behavior. However, on the new server these same users' local printers are mapped and they can see other users' mapped printers. This is causing confusion with the users.

Both farms are set to allow clients to map local printers. This setting is also true for the servers' local ICA and RDP connections. So, there must be something configured on the Windows 2000 server to block client local printers for certain groups. The problem is, I can't find anything anywhere. Nothing in domain or local group policy or local security policy. Is there somewhere else I can look? The previous admin left and didn't leave any documentation so I'm stuck. Thanks in advance!