SharePoint / Office 2007 and random authentication pop up's with “My SharePoint Sites” (Memberships)
Update – 7/2/2009
The Office 2007 hotfix (KB970950) is now available to download:
http://support.microsoft.com/kb/970950
The specific bullet that resolves this problem states the following:
“When you view folders that are listed under My SharePoint Sites in the Open dialog box or the Save As dialog box in a 2007 Office application, you are prompted for authentication. This problem occurs [...]
