Assertion failure.Interface Builder encountered an internal logic error
<p><strong>I am using SDK 4.2 and i got the error message while opening any interface builder.</strong></p>

<blockquote>
  <p>Assertion failure</p>
  
  <p>Interface Builder encountered an
  internal logic error. Choose
  "Continue" to continue running
  Interface Builder in an inconsistent
  state.  Choose "Crash" to halt
  Interface Builder and file a bug with
  Crash Reporter. Choosing "Crash" will
  result in the loss of all unsaved
  data.</p>
</blockquote>

<p>Need help on this..</p>
