No, It's happened with several files, and none of them seem to have any unreadable characters in them. It only seems to happen with the folders that are restricted access, meaning that people can drop files in, but can't take them out. I have another shared folder on the same partition that has no restrictions, and It seems to be fine. We didn't have this issue with earlier versions of OSx, with the exact same server 2000 setup, so it may have something to do with 10.4.4 specifically.