I'm getting an error, and I know it involved rendering beds. 
I'm no java whiz, but I can understand it so don't be afraid to use REALY TECHNICAL LANGUAGE! 
Pastebin: http://pastebin.com/tR6s4fu1
EDIT: I am using MultiMC, (because it's easy to use, I've manually installed mods waaaaay too much) if it makes any difference...
EDIT2: NEVER MIND! I found what was wrong... 
I used 4096 fix v2 not v4... 