Is it just me? I can't accept this answer, I get a little flicker of green, but nothing else.
And I just voted up this answer 10 times, apparently successfully, though I have to refresh the page every time to see the difference.
Sounds like you might want to clear your browser cache.
edit: if anyone can provide repro steps for this, we will look into it.
edit: We deployed improved voting code, so the denormalized counts are always set via live queries of the actual votes in the vote table rather than a brain-damaged