I was building a house using blocks from Chisels Mod when this crash happened:
java.lang.IndexOutOfBoundsException: Index: 37, Size: 36
http://pastebin.com/HUymCDmg

The blocks were in slot 12 of my hotbar, I have the dual hotbar mod configured to display 18 itens in the hotbar
Dual Hotbar: http://www.curse.com/mc-mods/minecraft/223272-dual-hotbar

I saw #216 and found that the dual hotbar dev tried to contact you

The bug is in inventory tweaks side and apparently it's fixed changing a single line.

See #216
Dual hotbars and auto refill do not work together.