1.3.12-109, forge 1777
Config Option for placemod: Denstiy 0.50

Placemod link:
http://minecraft.curseforge.com/projects/placemod

Placemod crash report of this:
https://github.com/ternsip/Placemod-1.9/issues/1#issuecomment-204932271

Crash Log:
http://pastebin.com/qS3ZKDAW

Should be fixed, silly typo. I also checked the other block classes, just to be sure.

Ok, thanks