2008 R2 Ent x64, SP1
w/ file services installed
Periodically, users can't overwrite certain files (whether copy+pasting through Windows Explorer or whether saving through an application). User receives an error saying "the file is still open." When I go to Share & Storage Mgmt > Manage Open Files, the file is not listed. Hundreds of other files are correctly listed as open, however, so it doesn't appear to be a service that isn't working.
Question #1: Could this be an issue with the client workstation?
Question #2: Why are users even confronted with this issue? In general, when I test the scenario by trying to save over any open document, I don't get an error.