such that the 100% means "100% minus one pixel". That will fix it

Thanks..that's helpful.

So I'm not sure that we actually want to take advantage of this extra info anyplace. Discussion?

I think for the purposes of the screen saver, it would be grand if it could "know" if it's playing or not, and behave accordingly. Are you saying the extra work consists of adding one line to the config file? That's hardly a great deal of work.

Doing a great job here, by the way.