I am having the same issues with networked home folders leaving behind a burn folder for any media, and then not being able to delete them with an error code of -61.
What I do to get them deleted is: Get Info on the file. Check the locked box under the general pane (it is unchecked on mine). Then uncheck the box. Does something, because after I do this I can send it to the trash and delete it.
Hope this helps until they get it fixed.