I have a user, who is myself, with full write access to any shared folder in the domain. Something you would expect to see with a domain admin, however this user is not setup as a domain admin. Environment is Windows 2003 native AD, with Windows 2003 servers. I have checked all the permissions and don't understand how this could be.
Example: User logged into workstation as user1, and can save files to any part of any mapped network drive, even when the write permissions on the folder do not list any group of which this user is a member.