title: Version mismatch in xcactivitylog after upgrading to XCode 4.2
body: <p>I upgraded to XCode 4.2 and am getting the warning below while running command line builds</p>
  
  <blockquote>
    <p>2011-10-22 20:16:39.327 xcodebuild[71845:1903] [MT] IDELogStore: Failed to open Build log store: Error Domain=IDEFoundationErrorDomain Code=1 "deserialization of log failed because of a version number mismatch" UserInfo=0x4011105e0 </p>
  </blockquote>
  
  <p>The build continues to succeed.
  Also, there's no such warning while running from XCode.</p>
  
  <p>How do I fix it?</p>