I see there is a VoxPopuli badge that requires 40 votes in a day, while at the same time it looks to me there is 30 vote cap a day. What is the deal here?
You can get 40 votes a day if at least ten of them (one-fourth the total) is on questions.
The limit is 30 votes a day on answers. But you must get in your ten question votes before the countdown starts on answers, fifth from the 30th in order to get the ten question vots.