I've been having the weirdest problem today. I was using the spell check on duden.de and it was slow as hell all day. Then, a few minutes ago, I got redirected to another page. One is the page in the screenshot, another one is http://about.grabyo.com.
It happens when you enter some text in the spell check box and click on TEXT KORRIGIEREN.
This was happening on Switzerland and Denmark by the way. Anyone experienced something like this?