title: Error highlighting - Visual Studio Express 2010 (C++)
body: <p>have been using Visual Studio Express 2010 (C++) well and fine for a good while now, but all of a sudden the error highlighting seems to have turned itself off when editing any file other than main.cpp</p>
  
  <p>I've checked my settings and as far as I can tell they're fine - everything enabled in IntellSence etc.
  Have restarted my machine a couple of times
  Have completely re-installed VS.
  Have checked it in another project so I don't think it's a prject specific problem.</p>
  
  <p>This seems pretty weird to me. Does anone have any idea what might be going on?</p>
  
  <p>Cheers. </p>