title: iOS5 Storyboard error: Storyboards are unavailable on iOS 4.3 and prior
body: <p>I've built a small app using storyboards and it ran great. Just before final testing I decided to try it out to see if it runs on iOS 4.3. I clicked on the gray 5.0 in the project settings and selected 4.3.</p>
  
  <p>The app failed to build with the following error message: </p>
  
  <blockquote>
    <p>Storyboards are unavailable on iOS 4.3 and prior</p>
  </blockquote>
  
  <p>Both the iPhone and iPad storyboards tell me that. </p>
  
  <p><strong>The issue that when I switched back to iOS5 target, I still keep getting these errors from both storyboards, and the product won't build!</strong>
  I checked: iOS Deployment target in projects settings is 5.0
  Target app deployment target is 5.0
  Build settings uses iOS 5.0 SDK</p>
  
  <p>What else do I need to do to restore my project to a buildable state? Is this a brand new bug or am I forgetting something?</p>
  
  <p>Update: I kept getting this error even after doing a clean.
  <strong>I changed the debugger in Schemes to "LLDB" and did an additional clean</strong>, the project now builds and compiles</p>