Hey there, I really love your work here. This mod is the awesomest thing I found in minecraft for so many years, hehe. Problem is that I play with few more mods on, and when I get from nether to overworld the world crashes.

This is the last crash report I got. Any idea why this is happening? Thank you for your work!
crash-2017-01-10_15.53.36-server.txt

Hi,

This has been fixed in the latest update (4.1). You should be able to safely update worlds from v4.