Try disable Vista index. Or check this post. Please post back with the result.
There has been a network or file permission error
http://www.chicagotech.net/netforums...hp?p=2760#2760
Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on
http://www.HowToNetworking.com
"carnivorousapetrick" <> wrote in message news

812F2E2-4F5A-4D66-AFE8-...
The problem--Using Vista/Office 2007, users (now plural) can access files on
their mapped network drive (z:\), but when they go to save them (to Windows
2000 servers), they get: There has been a network or file permission error.
The network connection may be lost. <file name>. Users are confirmed to be
owners of the folders, with full control access. Users can save files via
XP\Office 2003 and XP\office 2007 without problems
What I have done-- In addition to the usual suspects (disabling the
antivirus software and as much Windows security as possible), I have disabled
the web client and offline folders services, created the FormatDatabase Dword
value under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic
es\Csc\Parameters (all of this from
http://forums.techarena.in/showthrea...=810022&page=3). I've tried
disabling remote access 6.0 and saving files directly to a URL.
The only thing that I know that I haven't done is try the hotfix
http://support.microsoft.com/default...b;EN-US;936970. I don't have
the product ID because I'm not currently near the machine, and the users
aren't using terminal services.
Please help