Sprites are glitchy (Firefox)

[victorvillena]

This started a few days ago. I can still use Duolingo, lessons are OK, but this is ugly :S

Using Firefox 27.0.1

http://i.imgur.com/5unak8g.jpg

[bchan]

If you hard refresh (Ctrl + F5) does the problem persist?

[victorvillena]

I'm on a Mac, so it's Command + Shift + R, but yes, the problem is still there. My skill tree now shows the bonus skills grouped inside a grey bar, maybe they introduced some bugs alongside that.