title: cocos2d retina support not working anymore
body: <p>I am having a problem with my cocos2d game that supports retina display. Everything used to work fine but now i am working on an update. In this update i have only added 3 new images (also in hd). I am using texture atlases made with zwoptex. the png's generated are gameart.png and gameart-hd.png. I am loading the files using this code:</p>
  
  <pre><code> CCSpriteFrameCache* frameCache = [CCSpriteFrameCache sharedSpriteFrameCache];
      [frameCache addSpriteFramesWithFile:@"gameart.plist"];
  </code></pre>
  
  <p>when getting any sprite i am using <code>spriteWithFrameName:</code> method. Everything used to work fine before (Even on iPhone 4) but now i am getting the following error only on iPhone 4:</p>
  
  <pre><code>cocos2d: CCSpriteFrameCache: Frame 'tilei.png' not found
  *** Assertion failure in -[BoardTile initWithSpriteFrame:]
  </code></pre>
  
  <p>the file tilei is available in both gameart.png and gameart-hd.png (tilei.png and tilei-hd.png) and the plist files. i rechecked it a thousand times. what could be going wrong? notice that the error is not showing the -hd suffix even though its only occurring while running on iPhone 4.</p>