Log: http://pastebin.com/5trnxXAH
Problematic chunk screenshot: http://take.ms/DLqvr

Because of what it can be?

well you are just a bundle of edge cases, aren't you? o.o

I'm going to have you run through the guidelines for this one. Too many variables at play. Feel free to update the thread using the pencil on the corner, you can also comment on a closed issue if you want. https://github.com/Vazkii/Botania/blob/master/contributing.md