See crash here: http://pastebin.com/RsWhrnet

Running eleccore 1.6.326 (just released) with FML2095.

Let me know if you need full FML log file.

EDIT: Nevermind, we are getting corruption in loaded chunks while its trying to save

I think I have the same problem: McJtyMods/RFToolsDimensions#43 (comment)
or is it a different one?