Typography is not spaced correctly, making it illegible.

Description

When I load minecraft 1.6.1 the writing on screen is not spaced normally, resulting in some letters being broken up or appearing on top of each other.

I have downloaded minecraft 1.6.1 again and despite reloading minecraft many times, the problem has not reappeared.

What I expected to see was...
The writing should have been normally spaced, in its normal place.

What I actually saw was...
The writing was 'jumbled' with some larger spaces between letters, some letters appearing on top of each other, and some letters appearing broken up. The loading screen and title are fine, but the other typography is not. The problem remained even when I reloaded the game. I only disappeared when I downloaded minecraft 1.6.1 again.

Steps to reproduce
Replace minecraft file (1.5.2) with minecraft file (1.6.1)
Open minecraft 1.6.1 launcher and load game.
Select 'Play'