Unique Launcher Text Bug

This wierd glitch only affects my minecraft launcher. Whenever I type something, the text appears corrupt and broken. I have tried clean-installing MC launcher several times, but nothing works.

I found only one person experiencing the same issue over the internet here: http://www.minecraftforum.net/forums/support/unmodified-minecraft-client/1870660-minecraft-launcher-1-3-11-text-problem