Hi,
saw this post in similar Versions but never with a "cool solution" :)
We got NetApp 2050 as Filer in a Windows Server 2008 R2 Domain with Windows 7 Clients and Office 2010 Pro Plus, all up to date with WSUS.
If I open an Excel 2010 sheet on the Netapp Share or a Share on the Domain Controller and close it, it do not delte the temp file.
Same to PowerPoint 2010.
But with Word 2010, this works!
Therefor I don't think, this will be the NTFS permissions or Network issues.
We also got VMware Clients with Windows 7 and Office 2010. There the issue does not occure!!!
May be something in Group Policies? Could it be some Microsoft Updates?
I'm very interested in your opinions...
Best regards...