I personally believe that this is the most sensible note read thus far in this thread: naively I would answer that it can't work because nodes are not implemented as ul's - but that is what I also naively assume. In fact I just checked with firebug (although a CTRL-U would have been enough) and it turns out that indentation is precisely handled that way. More precisely the elements are ul.indent's thus I would include the class in the css spec: all in all as a solution it is slightly clumsy, but indeed it does work!