This is what happens, Facebook, when you change your site every 17 minutes. All Facebook summed up the situation:

We’re not sure who made the change but it’s definitely not a random fluke. Someone at Facebook (or a hacker who has figured out a way to manipulate the system) has changed the Facebook like box and now every page that has it on the site is telling people “F U” the moment a visitor arrives to the page and clicks “Like”.

We’re assuming they’ll fix it soon, if they haven’t already.

Did any of you catch this?