I'm not sure if there's already a thread on this, but I just noticed some flaws on the covers of a few of the Era 2 Mistborn books.
Alloy of Law:
1. Wayne is holding a gun!
2. Wax is wearing a tie, and he usually wears a cravat.
Shadows of Self:
Nothing much, just the tie.
Nothing wrong with Bands of Mourning, so far as I can tell.
The main issue is just with Wayne holding a gun in AOL.