You perform an unsuccessful logon to Microsoft Office Communications Server 2007 R2 Group Chat server. Afterward, you find that the Group Chat client window is not in the position that it was with your previous successful logon.
To fix this problem, install the following cumulative update:
2032922 Description of the update for Office Communications Server 2007 R2 Group Chat Client: July 2010
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.