Um.. When i try to open the equipment GUI, the game crashed.
I added some new mods before run the game(Minechem, BetterStorage, etc. may be conflict with them?), also i wear some armor, like the wings(Extra Utilities), tail(Tails), and the Void chestplate/leggings which in Thaumcraft4.(render error?>.>)

Crash report: http://pastebin.com/2zikJhdi

It's caused by slot.getHasStack() which invokes slot.getStack()!=null.
And it throws a NPE, which leads me to believe that whatever slot that is, has null for an inventory.
It might be Mariculture or TCon that's causing it, if their methods for getting their extended inventories have changed in their name. I'll implement something that should fix it with the next version.

Thanks a lot, I installed Mariculture and TCon indeed. >.>