I just added the ratings plugin to my theme (heavily inspired by stopdesign) and ran into a few problems, mostly to do with styles being inherited causing the ratings to break apart.. but that's nothing a little counter-styling doesn't fix (though it would be nice if it were truly drop-in).

This post is more about another element of the ratings plugin, however. It seems you can 'select' half stars (when hovering over them; this is a plugin option), suggesting the ability to vote, say, 3.5 stars. However, the tooltips and actual rating code seem to always round these up to whole stars anyway.

Is this a remnant from the code the ratings code is adapted from, or am I missing something?

The 1/2 stars description says it allows ratings to show half stars, not vote half stars. What is shown is the "average" rating.

Do you really want people to have a 10 step rating in their vote? 1-5 is pretty normal.

ahhh gotcha!

To answer your question: not really - I've already set it to show whole stars only for that reason; the annotation will show the exact score if needed, but with half stars displaying even as I moused over them, I got the impression that I could, if I wanted to, give a half-star-based rating; obviously I couldn't, so I was confused as to why there were half stars in the first place