When attempting to edit a signature file in outlook 2010 three of our users (out of about 110) receive the message "A file error has occurred" and the address to the %AppData%\Microsoft\Signatures\username.htm path in their roaming profile.
Users have full control of this folder, and the bulk of our users are having no problems, but I notice that the .htm of their signature file has the identical ~username.htm above the htm signature file. This would seem to be preventing Outlook from being able to edit the signature.
How can I remove this block?