When your SP is above 500, you get a slider to adjust the percentage of your vote. Say you have a vote worth 0.08 you can vote at 25% to vote 40 times a day at 0.02 instead of 10 times a day at 0.08.
It looks like the slider came back :) The vote on your comment was at 65%.

Edit: really? Your vote came in at 15%. Uplynwidme? Why?!?