The release notes also mention border-break, but the link is broken. It was in a previous version of the CSS3 draft, but it seems it has since been replaced with box-decoration-break?

I'm only posting this because of the broken link in the release notes

Thanks! Looks like we have some deprecating and renaming to do.

For Prince 9 we have renamed border-break to box-decoration-break, thanks again for pointing this out.