Visual cues for "This is a good point" links?

When I click "This is a good point," or "This answers the question," there is no visual cue. So, when I click it again because I think it didn't work, I get a javascript error talking about there being a problem "promoting" that item.

Seems like (a) there should be some sort of visual cue, and (b) a site doing so many things right shouldn't resort to a javascript popup (IMHO).
 
indifferent I’m thinking it could use a little love.
Inappropriate?
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