World Creation/Generation Crashes!

[Moony22]

http://pastebin.com/U2640nXT

 

I get this when I start up minecraft with Minecraft Forge, even though I haven't installed any mods with it. It also happens to me when I'm modding with eclipse, which is the main reason I'm using Minecraft Forge. I'm using build #6.6.0.510, but I've also used other versions and it still does not work.

 

I'd appreciate some help with this as it's getting really annoying as I see other users have this problem as well.

 

Thank you

 

EDIT: When I say I haven't installed any mods, I have obviously the ForgeModLoader, MCP, and Minecraft Forge

[Cloudy]

Update to 511. It fixes the bug introduced in 510.

[Moony22]

Thanks! I forgot to add I updated today and It worked, but thanks as your post worked