Win2003 Server R2 and copying files to share using SMB 0KB in size

Just wondering what others have found as a workaround for this issue? On MacWindows.com the subject is 0KB files when trying to copy to WIndows server or something along those lines. I have been testing Leopard for a while now and haven't had any issues and our Windows admins upgraded our 2003 SP1 server to R2 and latest updates and it seems to have broken my 10.5.x clients. Now when trying to copy files to a share it errors out and shows the file on the share but its 0KB. Things work fine from Tiger and Windows XP clients so its not permissions.....seems to be a bug with the Leopard finder and 2003 server R2 release or one of the patches since SP 1. About the only thing that seems to have helped a little was to simply check full control for the user on there folder and then set it back to Modify and things work fine. Still getting reports of students not being able to copy though so thats not 100% reliable. I have also found that for the Share Level Permissions if the users are set to Full Control it fixes the issue, but thats bad to do and leaves a hole open. This kinda feels like a bug I found with Tiger that got fixed in 10.4.6. Just wondering what others are finding? Thanks, Dan