Look at our Captcha page
Now look at Meta.stackoverflow.com:
The widths of the Captcha/image container and the Are you a human being? message combined are just a bit wider than the containing box on UX (and Programmers) so instead of floating right next to the captcha box it gets stuck under it.
Shrinking the .mainbar-captcha class' width slightly smaller fixes it, like this:
.mainbar-captcha { width: 600px !important;}
English has slightly more problems: