I'm also experiencing trouble with build .916 for MC 1.6.4
When I try to launch Minecraft, it starts to load, but closes again right away. I have not installed any mods in this "profile" yet except Forge, in fact I've made an entirely new and empty folder for this version. But it wont work. I've also tried to install it in the "Forge profile"(The one in the .Minecraft folder) but with no luck.
I've checked to be sure I'm running latest Java Version 7 Update 40:
http://puu.sh/4GKqA.png
Here is my log after 1 launch:
http://puu.sh/4GKhT.log
And my folder after trying to launch the game once:
http://puu.sh/4GKkG.png
