title: Layer based content filters aren't rendering in 10.8, either from Interface Builder or Programmatically
body: <p>In Lion and below you could use Interface Builder to turn on CALayers and then apply filters to a button, label, view, etc.  In 10.8 however, those UI elements simply do not render onto the screen.  In my testing programmatically setting a CALayer's contentFilters also makes it 'invisible'.</p>
  
  <p>I've made a simple test project that shows this bug:</p>
  
  <p><a href="https://dl.dropbox.com/u/12790096/ContentFilterTest.zip" rel="nofollow noreferrer">https://dl.dropbox.com/u/12790096/ContentFilterTest.zip</a></p>
  
  <p>On Lion the test app looks like this:</p>
  
  <p><img src="https://i.stack.imgur.com/mTdgS.png" alt="10.7 test app screenshot"></p>
  
  <p>On Mountain Lion the test app looks like this:</p>
  
  <p><img src="https://i.stack.imgur.com/ZBvSl.png" alt="enter image description here"></p>
  
  <p>For reference, this is running on the GM build of ML, and built by Xcode 4.4 GM seed.</p>