I get some weird messages about corrupt files when making a backup of files
on a network location.

I am using DFS. The files are on a virtual location with two domain
controllers hosting this location. The files are also replicated to two
folders. When backing up throught the network location I get error messages
about some files being corrupted. When backing up the same files from one of
the folders locally the backup works fine.

System w2003. The problem happens as well as making backups on a 2003 server
as well as on an XP Professional workstation.

Please advise.