Mac Direwolf v5 mystcraft crash

[Jacobbelveder]

Hello So, I was happily playing around in v5, no problems until I wrote a new mystcraft age, which I entered, the world didn't load, and minecraft crashed saying 'shutting down internal server' anyone have any idea what could have caused this? and how to fix it? finally heres a crash log for clever people who can understand these things: http://pastebin.com/fGMUexqa

 

[Nessiroj]

2013-01-25 18:46:08 [INFO] [ForgeModLoader] Loading dimension 12 (Brink) (bdz@209e235b)
2013-01-25 18:46:08 [INFO] [STDOUT] Unable to find spawn biome

2013-01-25 18:46:22 [INFO] [STDERR] java.lang.NoClassDefFoundError: l
2013-01-25 18:46:22 [INFO] [STDERR]    at a.<init>(CrashReport.java:27)
2013-01-25 18:46:22 [INFO] [STDERR]    at a.a(CrashReport.java:319)
2013-01-25 18:46:22 [INFO] [STDERR]    at yc.a(World.java:409)
2013-01-25 18:46:22 [INFO] [STDERR]    at com.eloraam.redpower.world.WorldGenMarble.searchBlock(WorldGenMarble.java:32)
2013-01-25 18:46:22 [INFO] [STDERR]    at com.eloraam.redpower.world.WorldGenMarble.a(WorldGenMarble.java:65)

Known bug in mystcraft. It's a world with marble = crash. just delete the world (DIM-12 or DIM12) and destroy the book.
Incase you can start the game anymore delete your playername.dat file in the saves/worldname/folder

 

[Jacobbelveder]

that's that all sorted, thank you very much, you are awesome