When I generate a world, all of the blocks seem to be wrong. If I read the documents correctly, this could be because it thinks my overworld ID is the ID for the nether? Or I could be over-analyzing things. I'm using 1.7.10 and a fistful of mods. I can provide a list if you think that's my problem.
http://imgur.com/WmUVZRB

Its caused by your firstful of mods breaking shit, you should remove those mods.

I'm going to try removing everything but your mod and readding them one at a time until something breaks. Then I'll go bug whoever it is that actually broke it. Sorry to bother you. I love your mod, it's exactly what I needed.