title: Error when compiling for device but not simulator
body: <p>I get the following error when compiling my project for the device, but not the simulator:
  <strong>error: objc/objc-class.h: No such file or directory</strong></p>
  
  <p>One of the files i have imports objc/objc-class.h and this is where it chokes.</p>
  
  <p>Base SDK is iPhone OS 4.0 and deployment target is OS 3.2</p>
  
  <p>Thanks</p>