Version:            (using KDE Devel)
Installed from:    Compiled sources

Two of the CSS selectors the CSS2 descendant and the CSS3 indirect adjacency selectors have the ability to make the matching process branch.

For instance the following two matches fail in khtml:
blockquote > div p
On BLOCKQUOTE > DIV > DIV > P, because P matches the descendant selector on the first DIV which fails the child selector

blockquote + div ~ p
On BLOCKQUOTE, DIV, DIV, P, because P matches the indirect adjacency selector on the first DIV which fail its direct adjacency selector.

To support this we need to be able to go back during the matching process so that any operator that could choose multiple elements have the chance to try them out.