title: Blurring effect disappeared on iOS 7.1
body: <p>For some reason the blur effect is gone from my app on iOS 7.1. I'm running the same code on a device with iOS 7.0.x and on another with 7.1. Here's what I see: </p>
  
  <p><strong>iOS 7.0.x</strong>
  <img src="https://i.stack.imgur.com/mWWy5.png" alt="iOS 7.0.x"></p>
  
  <p><strong>iOS 7.1</strong>
  <img src="https://i.stack.imgur.com/UbFCH.png" alt="iOS 7.1"></p>
  
  <p>What can be the issue and how to fix this? (obviously I want to keep the blur effect :))</p>
  
  <p>UPDATE:</p>
  
  <p>This is the color I set:</p>
  
  <pre><code>    [UIColor colorWithRed:255.0f/255.0f
                         green:201.0f/255.0f
                          blue:0.0f/255.0f
                         alpha:1.0];
  </code></pre>
  
  <p>and I set it from the <code>barTintColor</code> property</p>