title: VS2010 CTRL+M keyboard shortcut has stopped working
body: <p>I have a strange problem which seems to have recently appeared. I used to be able to press the keyboard shortcut <kbd>CTRL</kbd> + <kbd>M</kbd> + <kbd>O</kbd> to 'collapse to definitions' in VS2010 when editing code, but it seems suddenly the <kbd>CTRL</kbd> + <kbd>M</kbd> key seems to have stopped working. When I now press the key combination I get the Open File dialogue. </p>
  
  <p>I have tried the obvious things like resetting the keyboard scheme in <em>Tools > Options</em> but this has had no effect, I did also check that the default mapping for the keys were present and no other settings were overriding it in VS2010.</p>
  
  <p>I have tried searching for an answer on the internet but can't find any other solutions. Has anyone heard of this happening before and do you know of a way to resolve this problem.</p>
  
  <p>In addition, I very recently installed the new <em>Windows Live Essentials 2011</em> suite, I am starting to wonder if this has any relation to this, although I'm not sure why it would! I have not had any of the apps running whilst VS2010 has been open. This could be of course  a red herring!</p>