On Mon, Oct 17, 2011 at 08:27:54AM +0200, Paul Isambert wrote: > In the pre_linebreak_filter the mlist has already been turned into > an hlist. So you'll find usual nodes surrounded by math nodes. IIRC, this is true only for inline math, display math-resulting nodes are only accessible in one of the (h|v)pack filters. Regards, Khaled