Hotfix for Team Foundation Server 2010 Service Pack 1 Cumulative Update 1 – KB2580221

Recently, when I used Microsoft Visual Studio Team Explorer 2008 to manage the security settings for a Team Foundation Server 2010 server, I encountered a System.NullReferenceException exception. Upfront, I thought this might be due to conflicting hotfixes. After several rounds of investigations, I discovered that this is a known issue and has been solved in Hotfix for Team Foundation Server 2010 Service Pack 1 Cumulative Update 1 – KB2580221.

The following issues are also solved as part of the hotfix:

1. When you connect to a Microsoft SQL Server Analysis Service database in Team Foundation Server 2010, you cannot process the SQL Server Analysis Service database if the following conditions are met:
a.  The database is located on an instance of SQL Server in a failover cluster.
b.  The instance of SQL Server does not use the default listening port.

2. You have two files in Team Foundation Server 2008. For example, you have file A and file B. The earlier name of file B is the same as the current name of file A. You edit the two files and then check in the two files in the same changeset by using the source control in Team Foundation Server 2008. You upgrade the server that is running Team Foundation Server 2008 to Team Foundation Server 2010. You edit file A, and then you check it in. A user tries to download the earlier version of file A by using Team Explorer. In this scenario, you receive the following error message:

The server returned content type text/html, which is not supported.

Download URL for Hotfix for Team Foundation Server 2010 Service Pack 1 Cumulative Update 1 – KB2580221: http://www.microsoft.com/download/en/details.aspx?id=26211

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