Weird behaviour in VS2010

I have been using a Database project in VS2010 for some time now, and since switching to my new machine, once every so often I get this dialog box, out-of-the-blue.

There are no other database project related files open, nor am I doing any work with the database project or with the Server Explorer.

It tends to happen when I need to check-out a file from TFS

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Microsoft Visual Studio
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This server does not have one or more of the database objects required to use database diagramming.  Do you wish to create them?
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Yes   No   Help  
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The issue has also been documented on Connect and StackOverflow.