The item contains one or more busy items that cannot be changed

Question

We have a Windows 2003 file server and we are having issues with Macs retrieving files/folders from it. There is a folder on the Windows share named "dropbin" that UserA has full permissions on. UserB has the following NTFS permissions on the dropbin folder.
Traverse Folder / Execute File Allow
List Folder / Read Data Allow
Create Files / Write Data Allow
Create Folders / Append Data Allow
Write Attributes Allow
Write Extended Attributes Allow
This gives UserB the ability to look inside the dropbin folder and place content in there. This same user cannot delete or pull down anything that a different user (UserC) has put in there. UserA (the person with full permissions) should be able to pull down anything put in there.
This works fine from an XP box if an XP user (UserB) puts content in there UserA from a Mac or a PC can get and manipulate the data. If a Mac user (UserB) puts a file up there (it seems to happen with a .txt file, a .cp file, or a .zip file) UserA from a Mac gets the following error when trying to download the file:
"You may need to enter the name and password for an administrator on this computer to change the item named item.txt"
When you hit continue you get the following error:
"The item item.txt contains one or more busy items that cannot be changed"
If you proceed to enter in the admin credentials, the file doesn't copy down to the local Mac and fails without an error.
A couple of things we noticed....
1. If Mac UserB puts up a Word document or a .dmg file then UserA from a Mac can pull it down fine without errors.
2. On the Windows 2003 server we noticed that for each file we tried to upload it creates a ._ corresponding hidden file. For example, item.txt also has ._item.txt. If we go up on the server and remove the hidden file, Mac UserA can pull down the file fine.
3. We tried zipping the files (or files and folders) locally on Mac UserB's desktop then putting the .zip file up there but since it creates a ._file.zip Mac UserA still can't pull it down.
4. The fix we found for this is to have Mac UserB place the files they want to upload into a folder on the desktop, then upload that folder. When Mac UserA comes by they can pull down that folder's worth of stuff.
We are accessing the Windows 2003 file share by going to the finder and using the "Go" menu and entering in:
smb://servername/sharename
and they use their Windows domain credentials to log in.

Answer 1

We may have figured this out but it requires some more testing. The reason why the file upload creates the ._ files in the dropbin folder when UserB puts content in there is because UserB does not have the "Delete" permission in that folder. My guess is that it creates the ._ file when the file is in transit but then deletes that file after it has completed the transfer (but without the delete permission it couldn't remove the ._ file). What we did was added another user to the NTFS permissions for that folder, we added the built in "CREATOR OWNER" account and gave that user the "Delete" permission, now the ._ files do not appear under there and UserA can come along and manage the uploaded file okay.
Hope this helps someone else out.