title: GKMatchRequest playerGroup property not working
body: <p>For my turn-based boardgame I want the player to be able to set the board size to either normal,large or don't care. I created two playergroups ("1" and "2") for the two boardsizes, and set the playergroup for don't care to 0. In the docs it says:</p>
  
  <blockquote>
    <p>"When you set the playerGroup property on a match request to 0, then
    the player can be matched into any waiting match". </p>
  </blockquote>
  
  <p>But this doesn't seem to be working. Match requests with playergroup 0 are only matched to other match requests with playergroup 0. Has anyone been able to make this work?</p>