title: Xcode build & debug strange behaviour?
body: <p>There is probably a really simple answer for this ... I have a project where I have a single active break point set in the program.m. My problem is that when I hit "build &amp; Debug" both the editor in the main view and the editor in the debugger immediately drop into the code for one of apples .h files.</p>
  
  <p>I copied the code into a new project and it works fine, I am just curious what I have done to this one to make this start happening?</p>
  
  <h1>EDIT_001</h1>
  
  <p>I narrowed it down to these lines which is at the top of my code. My break point is further down, but on hitting "build &amp; debug" both editors jump into "CFByteOrder.h" although execution does continue normally, its hard to see where you are in the code. </p>
  
  <p>I am using 10.6 | Debug | x86_64, the break point can be anywhere below these lines, it always jumps into CFByteOrder.h, commenting out those 3 lines and everything works ok again. Also it all works fine if you copy and paste the code into a new project, very strange, maybe I accidentally set some option on the project.</p>
  
  <pre><code>NSLog(@"MDDStructure V002 ... ");
  if(CFByteOrderGetCurrent() == CFByteOrderLittleEndian) {
      NSLog(@"BYTEORDER: Little Endian");
  }
  </code></pre>
  
  <h1>EDIT_002</h1>
  
  <p>I am going to mark this as accepted as I can't reproduce the behaviour in a new scene, so I can only conclude that somehow / somewhere my original project became corrupted.</p>
  
  <p>gary</p>