Crash Report: http://pastebin.com/vFMMXPkh

Appears server is trying to do something that is only provided client-side:

java.lang.NoClassDefFoundError: net/minecraft/client/renderer/texture/IIconRegister

....I guess you fixed this in ce44355

Sorta wish someone had said something, We've been waiting for it to be fixed.

My bad, I forgot to reference the issue. But it was in the changelog.