I have a user who synchronizes her My Documents to the server.
She keeps getting a balloon that says "offline changes not synchronized"
Then when she clicks on it, it tries to synchronize and then says "Unable to merge offline changes on [path to folder on the server] The parameter is incorrrect.
It then has a window that says "need to synchronize, one file modified offline"
She is on Windows XP using Windows Server 2003