title: Visual Studio 2008 switches active project in solutions
body: <p>I don't know how it happened, but for about a week now Visual Studio keeps switching the active project everytime I move between files (of different projects) in the same solution. Of course when I press F5 to start debugging or Ctrl+F5 to run the tests, it tells me that it can't start because the class library can't be started directly... It switched the active project again.</p>
  
  <p>This is driving me nuts and I can't find a setting to turn it off. I've got the following addins installed:</p>
  
  <ul>
  <li>ReSharper 4.5</li>
  <li>TeamCity</li>
  <li>AnkhSVN 2.0.something (latest)</li>
  <li>GhostDoc</li>
  <li>Gallio</li>
  </ul>
  
  <p>I've enabled and disabled the Track Active Item in Solution Explorer option, but that didn't help.</p>
  
  <p>Anyone an idea?</p>
  
  <p>Thank you!</p>
  
  <hr>
  
  <p>Updates:</p>
  
  <ul>
  <li>I checked the ProjectGuid as suggested by sharptooth and all projects have a unique guid.</li>
  </ul>