I get this crash on the new version. http://pastebin.com/64Xfk2MX

same here

Doesn't look like an error on my side, have been testing some and it seem to be Optifine that is causing a similar crash, try removing optifine.

I have identified that when both "MoarSigns" and "The One Probe" is installed it is crashing.
Installed separate, it works.

I will look into this some more, just wanted to let you know my findings.

Thank you for your fast response.

ok, I have solved the issue now, will release a fix soon, it was a load order error with "The One Probe"(TOP), now the mod forces forge to load it before.
Simple fix but hard to see what was wrong from that stacktrace, it worked in the dev environment because it loaded it automatically before all the time, had to use both mods as standalone mods in another dev environment and then carefully look at the data when it crashed to see that it couldn't find a class from TOP, therefor concluding that it was loading before TOP.

well, no optifine im my pack but still crashing ... with 4.1.0.5 everything is fine
crash-2017-01-09_22.12.14-client.txt

what pack are you using so I can easily test with the mods in that?

It's a self made pack that i created with MultiMC.
If i can help let me know how.