Updated FML:
MinecraftForge/FML@156a9ae03a3c80bd1499a8e692c44a322ad9df62 Fix build script
MinecraftForge/FML@7d3b1250e8368886bed0e0da350a94abaa4b6247 Fix handshaking properly. Also, fix ID syncup. It now will completely freeze the idmap after preinit. This frozen map is used to inject "new" stuff into existing serverside worlds. Interesting sideeffect: remote servers lacking things will change the client, to also LACK ids for those things. watch for -1 ids in your remap events. Note: idmaps should be considered temporary per server instance. SERVERSTOPPED will restore "startup" state, as will client logout.