title: Visual Studio 2010 shows old Visual Studio 2008 "Add Reference" dialog
body: <p>I've just noticed a very odd behaviour with VS2010. </p>
  
  <p>At some point since install, it's reverted to showing the old VS2008 "Add References" dialog, instead of the fancy new VS2010 one (I do have VS2008 on this box too).</p>
  
  <p>I've googled around and not found a solution.</p>
  
  <p>I've tried fully resetting all options, both from Tools->Import/Export settings->Visual C# Dev Settings, and by issuing a DEVENV.EXE /RESETSETTINGS</p>
  
  <p>Has anyone got any suggestions or solutions to this issue? Has anyone even seen this problem before?</p>
  
  <p><strong>EDIT:</strong> PEBKAC. As noted below, the "fancy new Visual Studio 2010" Add References dialog was actually a Productivity Power Tools Extension feature - which I disabled yesterday. Silly me! Thanks to all commenters</p>