Network connection for the user mentioned above is hardwired. She is a heavy power user, opening & closing lots of PowerPoints all day long. Other hardwired users also see this problem occasionally (one on XP, one Vista), and we have reproduced it using a wireless laptop running Windows 7. This is a small Windows domain network running Windows 2003 SBS and Active Directory. The Terastation III is also configured to integrate with Active Directory on this domain. We don't think this problem occurred until the Terastation III and Office 2007 were introduced on the network. Before this, users were running Windows XP, Office 2003, and interacting with .ppt files on Windows SBS server shares and not experiencing this issue.
Any help would be greatly appreciated.