title: Xcode doesn't show code when stops at breakpoints
body: <p>I'm having this weird bug:
  I put some breakpoints in my code, the debugger stops on them, but Xcode doesn't bring me to the file/line where breakpoints are. It just jumps to the project page where you edit your project settings (build phases, build settings, etc.). And when I go to the breakpoints navigator and click on a breakpoint, it doesn't take me to the breakpoint either.</p>
  
  <p>I don't have a clue why this happen. Breakpoints in my other project work fine.</p>
  
  <p>Have you ever had this problem? If someone could help I would be very greatful. It's really annoying.</p>
  
  <p>I'm using Xcode 4.2.</p>