I'm not sure if this is a bug with Forge or MCP but, after setting the gamerule randomtickspeed to 0 
Minecraft will load to the menu completely fine, but if I attempt to load into any world 
it crashes the server side and the client sends me back to the menu saying that I was disconnected from the server, or the client may crash as well. 
  
 
Pastebin of Crash Report: http://pastebin.com/GzPSTA8Y 
 
 
 
Other Info: 
 
I'm compiling with Eclipse WITH NO MODS(other than the 2 default mods) and still getting the crash. 
I have recreated it multiple times by deleting the project and reinstalling,  
changing the randomtickspeed to 0, and then quiting and trying to restart Minecraft. 
As of this post 1.8-8.0.9.1016 was the latest version 
Edit: Also affects the launcher version of Forge_Minecraft_1.8. 
 
  
P.S. 
I'm aware you can stop the crashes by deleting your Meta-Inf, but still... a bug's a bug.