Open 1.2.0: Crash after entering Deep dark

[Alanis2]

Version:
1.2.0

What is the bug:
After playing for a while i decided to open a Portal to Deep dark by using
4 Unstable ingots and Cobble to craft the gateway.
After placing it down and right clicking it, it loades the terrain and crashes.

Mod & Version:
extrautilities-1.2.2

Paste.feed-the-beast.com log:
http://paste.feed-the-beast.com/view/e516d9db

Can it be repeated:
Didn't testet it in an another world but happens once in the same world.

Known Fix:
restarting the client couple of times seems to fix it.
going back and in works then.

 

[Byte Templar]

Looking at log, it seems to try create Twilight Forest biome and that should not happen to my knowledge in creation of Deep Dark. Seems weird!

 

[PhilHibbs]

I'm getting exactly the same crash whilst exploring the Deep Dark.
Pack version: 1.3.4
Extra Utilities: 1.2.2
Twilight Forest: 2.3.4

This generated on the roof of the dimension:

Spoiler

Plus the base layers of various other Twilight Forest features, such as the big oaks, the circle of 8 mossy cobblestone pillars, etc.