crashlog:

http://pastebin.com/AV0J936u

versions, etc can be seen in the attached pastebin.

Idk howto reproduce, maybe player only picking berries in the woods...

IIRC, Adubbz had fixed this in 1.9, but I guess forgot to backport it to 1.8.9?

Nup, completely different issue that didn't need fixing in 1.8. This doesn't look related to BoP to be honest, judging by the name handler$onSetDead$0, i'm fairly confident in saying that it's an issue with Sponge.