title: Get Rid of 'Compass Interference' Message while using compass through NSLocationManager
body: <p>I am working on augmented reality with GPS &amp; Camera interface but more often I am having this calibration message as 'Compass Interference' see image.</p>
  
  <p><a href="http://static.iphonelife.com/sites/iphonelife.com/files/imagecache/teaser_thumb/u2440/compass8.jpg" rel="nofollow noreferrer">a busy cat http://static.iphonelife.com/sites/iphonelife.com/files/imagecache/teaser_thumb/u2440/compass8.jpg</a></p>
  
  <p>this is appearing very often, while in other apps it working fine with very less such messages.
  Is there any thing needs to be changed or is it normal.</p>