Riq, I have noticed something funny in the latest version of 0.99 final with the sprite sheet, when I was testing with the new tmx class I created.
Now, I know the rect value going into the initialization of the sprite of the sprite sheet is correct. The rect is x: 0 y: 0 width: 66 height: 120.
However after initializing the sprite, the sprite rect_ values are: x:0 y:66 width:120 height: 0. It seems the values are being incorrectly assigned which then causes a execute bad access error.