Word cannot save this document due to a naming or permissions error on the destination volume I have a mapped network folder on my Mac.

About a week ago everything was fine and I could save Word documents to my personal folder on the network drive. Now, I've been getting the following message: 

"Word cannot save this document due to a naming or permissions error on the destination volume"

I have the latest Office and OSX version.

Why is that?
This problem appears to be tied to how Word creates temp files when saving changes. The fix appears to be creating a .TemporaryItems directory with global read/write access at the root of the network share.

Creating a .TemporaryItems directory with global read/write access at the root of the network share should fix it. If a directory with that name already exists, check the permissions on the directory and set it to be globally read/write if needed.

Links with more information:

http://prowiki.isc-csg.upenn.edu/wiki/MS_Office_and_Network_Volumes
http://hints.macworld.com/article.php?story=20051122213207398