title: mkmapview crashing in IOS 4.2
body: <p>This is karthik. I am getting this following error when i run my application. When my application trying to find the user location its crashing. Actually in <strong>IOS 4.0</strong> and <strong>4.1</strong> its working fine. Only in 4.2 its crashing. Can you help me?</p>
  
  <blockquote>
    <p>CoreAnimation: ignoring exception:
    (null) must implement title when
    canShowCallout is YES on correspoding
    view > visible:0 +0.00000000, +0.00000000 2011-05-09 12:32:40.631 HOV[1821:207] <strong>*
    Terminating app due to uncaught
    exception 'NSGenericException',
    reason: '>
    visible:0 +38.91791916, -77.20580292
    must implement title when
    canShowCallout is YES on correspoding
    view > visible:0 +38.91791916, -77.20580292'
    *</strong> Call stack at first throw:</p>
  </blockquote>