Got mine last night and looked through them kind of quickly. A few things I noticed on my first pass.
1) My Wolf Demon has two left claws.
2) My Verocithrax is missing the tree they were supposed to add for support. It had a note saying what it was for and how to use it though.
3) As many people have said, Sir Daniel is missing a left hand. Not a real big deal as it is behind a shield.
4) One of my dragons, I think it was Blightfang, has a too small slot for the wing to fit in.
Also, if you got the UFO be careful opening it. The landing gear and alien head are loose and very tiny. Overall I am very pleased with it. Lots of useful stuff in this set.