I found this post http://social.technet.microsoft.com/Forums/en-US/windowsserver2008r2general/thread/45bf397a-73c0-4636-bd92-97028b56357d I can't respond or reply to it, as it's marked read-only.
I am also seeing this same problem, this is a brand new installtion of Windows Server 2008 R2 Enterprise x64. I don't know what the other peoples issues were, but I'm seeing the error in deleteing the spool file on users who are logging in from a trusted domain. Not really sure what the best way at the moment to deal with that is as it appears to be a cross-forest issue.
I could most likely assign a group from the trusted domain permissions to delete files in that folder, but it seems if they are able to create files in that folder, they should also be able to delete. Wouldn't they wind up in the Creator Owner group?
Jeffrey S. Patton Assistant Director of IT School of Engineering Computing Services University of Kansas 1520 West 15th Street Lawrence, KS. 66045-7621