title: How to stop Visual Studio from "always" checking out solution files?
body: <p>For apparently no reason, every time I open my solution, Visual Studio checks the sln file out.</p>
  
  <p>If I compare it to the previous version there are no changes. But this is really frustrating since everybody has the solution checked out.</p>
  
  <p>I'm using VS 2008 and TFS 2008, both SP2.</p>
  
  <p>Any idea on how I can stop this thing to happen? Or is a feature/bug of the TFS source control provider for VS?</p>