My minecraft crashes when leaving creative inventory. Its been happening 1.3.1 - 1.4.2

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here

What actually happened was...:
Describe what happened here

Steps to Reproduce:
1. Guide - (For me, maybe only me) Go to Creative Mode
2. Open Inventory
3. Exit Inventory and it crashes (When you reopen Minecraft, everything is still saved and what you got in the creative inventory stays where you put it.)