title: Libpng error in a iOS 5.0 compilation using XCODE 4.2
body: <p>When I try to load a Triangle, I'm getting the next error:</p>
  
  <p><code>Mesh_Mesh_Box001.001: 35: GL_TRIANGLE_STRIP
  libpng error: CgBI: unknown critical chunk</code></p>
  
  <p>But this works on a different example.</p>
  
  <p>What is going on?</p>
  
  <p>Thanks in advance.</p>