They are at least partially broken, in that selecting what the small avatar shows is broken for me in two browsers (Firefox and Chrome).

It seems that instead of using the frame you define for the small avatar it always picks a 0x0 area in the upper left corner. That happens to me both when uploading a 700x700 image and also when uploading an image that already has the right size for a small avatar.

I realize some others seem to have managed but alas it's broken in Chrome and Firefox here. In the other thread about the white border to the right other people reported the same problem.