A few hours ago (technically "yesterday" by SO time), I looked at my profile and noticed that I had voted on approximately 560 questions. Neat.
Later I realized there's a badge once you vote on 600 questions! Awesome!
So I voted up a couple more questions that I liked (and down one that I didn't). I checked my profile again just now, and it shows that I've voted on a total of 525 questions. Huh?
Is the system just toying with me because I want a badge now? My guess is no (though it would be funny if that were the case). If anyone can solve this mystery, I'd love to know what happened. Thanks.