Problems with infinite CCParallaxNode

Hi all.

I’m working on a game build with cocos2d and SpriteBuilder and got a strange Problem while using the CCParallaxNode to achieve an vertical infinite scrolling background. I’m using Ray’s CCParallaxNode-Extra (used in the Space Shooter Tutorial).
Everything works fine when I’m building the project in xcode and run it on a real device. On the other side when I’m uploading a build to itunes and test it with testflight I have the problem that the scrolling doesn’t work and I always got gaps in my backgrounds. This is also reproducable on the Simulator. It looks like only every second background image shows up. But only for the second and third layer… The first layer works fine. Don’t know where to start here. Has anybody of you an suggestion what could cause this problem? Thanks for your replies!