Hi I\'m trying to fix this bug with spritekit\'s physics shape appearing upside down.
[SKPhysicsBody bodyWithTexture:monsterTexture size:monsterTexture.size]
I think it is a bug in Spritekit on iOS8. My suspicion is that the bug occurs when the texture for the physicsbody is retrieved from the internal cache. It might be incorrectly flipping the image to try to correct co-ordinate systems from CoreGraphics.
Use bodyWithBodies instead. Bummer, I really like this feature.