Background info: Tested on two different laptops, one an IBM Lenovo Thinkpad and the other a Dell Latitude D510.
My Documents are redirected, via group policy, to a DFS root located on a server (2003). To the users DFSHOME\Accounts\Username\My Documents.
All users are a part of the local administrators group via group policy.
My Documents are made available offline and synched.
What Happened: When I installed Sp3 on the computers and unplugged the network cable, the offline files were no longer available. An error comes up, Windows Explorer: Configuration information could not be read from the domain controller, blah blah blah blah.
When the computers just had Sp2 on them, this was not the case. Everything worked as it should. Once unplugged from the network, it went directly offline and I was still able to get access to the My Documents via Offline Files.
When I uninstalled Sp3, everything went back to normal and My Documents were available offline. Installed Sp3 again and again had issues.
I can not find anything online about this, if anyone has had this issue please advise or let me know if there is a fix.