I have found a bug in CCImage_marmalde.cpp file in method bool CCImage::_initWithJpgData(void * data, int nSize).
The files are opened s3eFileOpenFromMemory() but not closed.
I’m finally getting around to updating all my code and noticed that the change above is now missing in cocos2d-1.0.1-x-0.13.0-beta, it was in my previous version.