"Word cannot save this document due to a naming or permissions error on the destination volume."
This is most bizarre. Mac users using MAC Office 2011 on Lion connect to a Windows 2008r2 share via SMB. The windows share contains dozens of folders all with different file permissions.
The user can create a new word document and save it into a folder on the Windows share that they have "full control" over BUT if they quit word, re-open it, re-open the document then go to save Word will say "Word cannot save this document due to a naming or permissions error on the destination volume."