I have a problem by using the .pvr.ccz format. I have a simple spritesheet with a few sprites on it created by TexturePacker. It's loaded like in my example code below.
// Apple recommend assigning self with supers return value
self = [super init];
[[CCSpriteFrameCache sharedSpriteFrameCache] addSpriteFramesWithFile:@"spritesheet.plist"];
CCSprite * sprite = [CCSprite spriteWithSpriteFrame:[CCSpriteFrame frameWithImageNamed:@"play-button.png"]];
sprite.position = ccp(0.5, 0.5);
sprite.positionType = CCPositionTypeNormalized;
At a point in time (memory fails) cocos2d and TP changed the .pvr format (produced and read) to the normal 'flipped' version. Thus, just select the
Flip PVR check-box in TP, and the rendering should be fine.