4chan's themes not loading?

It started a few days ago with the boards from zip.4chan, then spread through all of them, and now I have to click a theme at the bottom of the page everytime I reload or view another page.

clear your 4chan.org cookies, then go to the bottom right of the image board page where it says "Style [Futaba | Burichan]" under the delete post password box, and click on either one, Futaba is the normal default.