When I add custom variables to armor that increase and or modify health/damage with an mcedit filter, then proceed to hover over the item in-game, the game crashes

Put the summary of the bug you're having here

What I expected to happen was...:
Pick up the item by hovering over it, then shift clicking it into my inventory.

What actually happened was...:
the game crashed

Steps to Reproduce:
1. Run sethbling's new item-modification filter over a chest with a piece of armor/weaponry
2. have command-block bug running in the backgroundhttp://www.minecraftforum.net/topic/1870385-161-snapshot-bug/ that bug is explained here.
3. try to pick up item