I think the problem previous was that they were basically invisible so you couldn't tell which was which. The problem now is just that they look shit.
Hopefully the flat grey ones will be non-shit looking and usable.
I don't think it needs a tooltip or owt, it's pretty obvious what thumbs up/down does. So long as they are recognisably thumbs up/downses.
But yeah if the newer ones look shit then rollovers is probably the way to go. Be nice to overhaul all the icons with flat versions. The cartoony semi-3d ones are looking a bit dated now. Might do that if/when I'm bored enough if these ones look ok.
When one rates a post, as I just have, would it be possible to take the person back to where they were in the discussion rather than to the post they just rated?
In your user profile popup, there are scores showing your total score and the up and down votes you've awarded other users.
Also, post rating is now in mobile mode. You will need to clear your cache to get it to work, especially if using Chrome on Android as it caches like a motherfucker.