Can't give a thumbs down on Youtube!

Interesting problem I have. I have a few accounts on youtube, and with some it is impossible to put a thumbs down under the rollers. That is like you can put you can also like to disliking comments, you can write them, but dislikes are not counted. That is, push your finger down it becomes black as it should be, and when you update the page dislikes remains the same as it was. And so with all the videos from all browsers. What earlier all was normal. Other ACC everything is OK. Very strange, but in Google no information about this not found. Maybe someone knows what's the matter?