I am upgrading my computers to Windows 7 Pro x64 and have found a strange problem.
I have Sharepoint 2 on a Windows 2003 server which is basicly running the companyweb off of a replaced SBS. (before I was here.) When users that only have read access on the Sharepoint server try to open Office docs they are asked for a username and password. If they hit cancel the document opens but I have some hyperlinks in the excel spreadsheet that point to another spreadsheet on the companyweb which will fail and tell them the file could not be opened. If I give them edit access to the companyweb they work fine. These are files that they can't have edit access to.
My remaining XP system do not have this problem.