Crashing single player since update...

Since the update I am crashing on single player constantly about every 2-6 mins. even with a new map. The error I get is "java.lang.IllegalArgumentException: Payload may not be larger than 32k" I have 4 gigs already put aside for it. From reading online it appears that the hats mod is to blame? However if I disable the hats mod then the game will not even load up without a forge error. I need to find either a way to stop original error, or someone explain how I can disable hats and still load game??