I just noticed this too. I know it was there earlier today. I assumed they were just messing around with things :)
I figure it's an intentional removal. You can still find a total positive ratings received count in your profile though, so that's an option for those who liked to see the number.
Simply something to take whatever happiness we can from you. No need to be alarmed. Move along. ... I SAID MOVE ALONG! >:C
It looks so naked! ): We need something new and colorful there :D Like lots of facehuggers and rainbows
That one is an accident. O____O We were removing something else, and it looks like it took out the post ratings too.