Animating sprites in Cocos2d

How to avoid unnecessary release? I am running this code:

CCSpriteFrameCache * cache = [CCSpriteFrameCache sharedSpriteFrameCache];
    [cache addSpriteFramesWithFile:@"boosttexture.plist"];

    CCAnimation * animation = [[CCAnimation alloc] initWithName:@"boosting" delay:1/24.0f];

    [animation addFrame:[cache spriteFrameByName:@"ship.png"]];
    [animation addFrame:[cache spriteFrameByName:@"ship_boost_l_r.png"]];

    id action = [CCRepeatForever actionWithAction:[CCAnimate actionWithAnimation:animation]];
    [spaceShipSprite runAction:action];

      

        
        
        
      

    

When the animator is running (provided - its ugly), I get it in the console:

2010-04-14 13: 40: 16.311 Booster2K10Beta [521: 20b] cocos2d: deallocing CCSpriteFrame = 00EBA620 | TextureName = 4, Rect = (1.00,32.00,32.00,32.00)

2010-04-14 13: 40: 16.411 Booster2K10Beta [521: 20b] cocos2d: deallocing CCSpriteFrame = 00EBA620 | TextureName = 4, Rect = (1.00,32.00,32.00,32.00)

2010-04-14 13: 40: 16.496 Booster2K10Beta [521: 20b] cocos2d: deallocing CCSpriteFrame = 00EBA620 | TextureName = 4, Rect = (1.00,32.00,32.00,32.00)

It seems unnecessary that the same SpriteFrame gets dealloc'ed 24 times per second - how to avoid this?