The review mod Canas got hacked, so he just cleared all the abusive reviews, that is the reason for all the broken whistles :/
He is STILL hacked, so, whatever you plan to do today DON'T FLAG REVIEWS TODAY. You will get negative whistle ponts for it, until the issue with Canas is not cleared.
UPDATE: Canas got de-modded. Everything is good, the adminstrators have been contacted. Don't worry.