Open 1.4.1: [1.6.2] Crash on world load

[Yutang]

Version:
1.4.1

What is the bug:
Occasionally when I try and load up my world it just crashes back to the launcher. I'm pretty certain it happens before Downloading Terrain is displayed onscreen.
[I am using Optifine]

Mod & Version:


Paste.feed-the-beast.com log:
http://paste.feed-the-beast.com/view/0c93c56e

Can it be repeated:
Seems to be random.

Known Fix:

 

[Henry Link]

Is this a brand new world or an existing? To be honest ticking errors are the hardest to solve. If this is an existing world then I suggest try loading a new one and see if you get same error. If no errors on the new world then I suggest you restore your world from backup (if you have one).

 

[Yutang]

This is an existing world that I have progressed in quite far. I had a backup but I didn't use it as whenever I have had this crash the world loaded as normal when I logged back on the next time. I have also had a ticking memory connection crash when I was setting up a tesseract recently.