I have another crash that I believe is related to my earlier one, #49.

Pastebin: http://pastebin.com/vSLB6NFH

Large pack, but no mekanism. Since the server this is occured on is live atm, I was forced to simply delete the block so my players could keep playing, but let me know if you need help pinning it down more.

This is already fixed here: 76bf0c5
I will release an update with it soon.