If you continue to have trouble, please post your complete client-side console log in debug-mode to pastebin.com and link your paste URL here.
To find your logs: http://desk.feed-the-beast.com/inde...29/1/what-log-do-you-need-where-can-i-find-it
I'm asking for the console log for a reason. Please provide the console log, and not the crash report.
Hard to get a Debug Console Log when it just crashed and I had the it disabled. I'll try and get you one while I play, but It'll be before a crash.
Here's part of your problem:
You shouldn't allocate more than 5GB, ever.
- [11:16:35] [INFO] MinecraftLauncher.setMemory:120: Setting MaxMemory to 11264
It can't handle more memory?
Well, got another crash. I don't know what's causing it, but it happens when I create a portal and then try and enter the nether. Also, when I leave it happens if I'm not allowing enough time to pass before going to the Overworld.
http://pastebin.com/SVdyP2XN
The crashes are random and I don't even know the frequency of their happenings. All I know is that I can cause it be creating a portal and then entering it quickly.