Typically  when we open an electronic document (excel or word) it show a little lock on the document and you can see someone has it open and you can only open in read only.  I have one user that when they open these types of documents it does not display that document as locked to other users and they can then make edits and this user then looses their changes.  I have tested this on document under version control or not under version control and I can't see it locked on either type of document when this one user opens it.  I have deleted user attributes so assume I am missing something.  Any suggestions where else to look?  Thanks