Occurs when scrolling through the new material info gui
Upon adding iguana tweaks, a 21st page of the gui becomes available (19 with just tcon, 20 with tcon+thaumcraft)
going to this 21st page instantly crashes
http://pastebin.com/u6xP8PVj

(to note, this also happens without thaumcraft. I should have mentioned that)

Yes, I know exactly what causes this. Will have to adapt some stuff to tcon changes.