Same here, especially at the shoulder joint so the arms could collapse. Apart from that though, a very solid figure. The weight was the first thing I noticed. And the chrome, silver, gold and red - all the colours of the G1 Dinobot rainbow!!
I also like the face changing gimmick. Quite a nice touch. This is what I expect Masterpiece grade to be. Definitely belongs behind glass on display. If only I had more room...