Put the summary of the bug you're having here
Since the update to 1.7.2, Minecraft crashes everytime I launch it

What I expected to happen was...:
To launch my world as usual

What actually happened was...:
Minecraft crashed and I got a crash report

Steps to Reproduce:
1. I lauch Minecraft
2. I see the screen with the Minecraft News
3. I click on "Play"
4. The Minecraft Title screen appears
5. I click on Singleplayer
6. I select my world then click on 'Play selected world"
7. After about 10-20 seconds, the game crashes and I get a report (which I attached to this report