SMB users and file ownership issues

Hi all, I'm having a curious issue with my new 10.5 server installation. Here's the whole picture: -Brand new Quad Core Xserve -Started as Workgroup configuration, but promoted to Advanced -Bound to Active Directory -Is OD Master, and the only OD server I have. We organize our file storage here a little differently than others do- I have a script that queries the database for our accounting system, and when new jobs are created in that database, a folder hierarchy is made in the format Client --Job Number ----Department1 ----Department2 ----Department3 I have permissions set so that users have full control of content within each DepartmentX folder, but no higher. Under AFP, everything works out exactly as we want it to. When the same account logs in under SMB (which will only be used by my few Windows clients), I see the following symptoms: -User could create a folder, but can't name it differently than the default. You could make New Folder and New Folder (2), but make a folder and try to rename it, Windows responds with a cannot rename, access denied error. -Same applies for right-click: New Text Document. Default names are acceptable, renaming isn't allowed. -New Folder can be opened, and written to. Files here can be saved and renamed at will. I've tried setting the DEfault permissions to be both "inherit from parent" and Assigning as Read and Write for everyone, with no luck. Again, the same user accounts logging in under AFP are fine. Does anyone have a guess what setting I have wrong here? Thanks.