It looks like now the interface waits for the vote to actually get received, and only updates once it has been.

I suppose that that's actually better, but

If this delay can't be easily fixed, an animation indicating that the operation is in progress (like one appearing when sending a comment) might help with the interface responsiveness issue.

is definitely better again. Otherwise I'm tempted to mash the voting button until something happens. It doesn't have to be an "animation" it could just be a still image of something that means "waiting" like a clock or a sandtimer.