IFileOperation::MoveItems not working on namespace extension root

So I have this rooted (on a specific file type) namespace extension that supports drag-and-dropping files into it. I use IFileOperation to handle file operations.

Moving/Copying a file that comes from outside the NSE into a sub-folder works. Copying a file into the namespace root works. However, I can't get to move a file into the root. It just does. Not. Work. My extension is never inquired for a ITransferDestination, although it is for other use cases.

Have you ever been in this situation ?

Notes:

• I'm building the extension on top of Bjarke Viksoe's great TarFolder 开发者_C百科codebase.
• The error I'm getting (through the standard Explorer dialog) is "The file is already in use"
• the copy engine seems to end up deciding I'm trying to move a file from the regular file system to the regular file system. The above error is the one returned by a call to MoveFileEx, from what I could gather by tracing in there.
• the PIDLs look correct, and IFileOperation::CopyItems works for the same inputs anyway.
• I'd like to stick with IFileOperation, as it provides the most natural integration

Try contacting Bjarke directly, he may have some insight as to what may be going on.

His email:

bjarke@viksoe.dk

I personally haven't worked with his frameworks before, sorry I can't be of any more help than this.