Sort of a feature request, but I've often accidentally pressed the "Thumbs Down" button when trying to "Thumbs Up" a replay or live game I'm spectating. Then, after I realize my mistake, I can't change the vote to the correct one, or even just cancel my vote altogether.

I think if people were able to change their vote after casting it on live games and replays, it would greatly improve the liking/disliking feature.