title: sizeThatFits: is returning different Values iOS 5 and iOS 6
body: <p>I am calling <code>sizeThatFits:</code> on a UILabel in a ImageView subclass and I located the error to be <code>sizeThatFits:</code>.  On iOS 5 I am getting 3 lines and on iOS 6 1 line.</p>
  
  <pre><code>CGSize labelSize = [mTitleLabel sizeThatFits: CGSizeMake(self.bounds.size.width, 30)];
  CGFloat lines = ceil(labelSize.width/self.frame.size.width);
  </code></pre>
  
  <p>I tried to do the calculation myself by calling the following method, but I am getting 7 instead of 3 on both versions.</p>
  
  <pre><code>float lines = mTitleLabel.frame.size.height/mTitleLabel.font.lineHeight;
  lines = ceilf(lines);
  </code></pre>