I'm having a weird problem with a windows 2003 domain controller. We decided to move our computers from a workgroup to the domain. After joining them to the domain the file uploads are horribly slow (doesnt matter if I use a mapped drive or go by UNC path). Downloads still seem to work fine. It also does it when copying files from the mapped drive to another folder on the same mapped drive. Performing the same task on the few machines that haven't been joined to the domain (a few XP home machines) only takes seconds. I tried disabling SMB signing as suggested by a microsoft KB article with no luck. Anybody else run into this and found a fix?