title: Partial black background in UIWebView on iOS7 after setting content inset
body: <p>I have a problem with <code>UIWebView</code> on iOS7:</p>
  
  <p>First I'm setting the content inset for my web view scrollview:</p>
  
  <pre><code>[webView.scrollView setContentInset:UIEdgeInsetsMake(40, 0, 0, 0)];
  </code></pre>
  
  <p>Then when web view loads an empty page there is a black rectangle at the bottom of the web view, that has the height 40.</p>
  
  <p>It's for sure because of content inset, and I met this problem only on iOS7. How can I solve this? Any help will be appreciated!</p>