Broken layout in WP 3.8.1

Hello,

I quite like new design o version 3.8.1. But after few days of using, it broke down and looks like this. The font is sort of strange.

https://www.dropbox.com/s/77ipm41humxemld/Screen%20Shot%202014-02-15%20at%2011.55.51.png

Would anybody advice me how to put it back to normal?

Thank you