multi-mark-engraver not working?

[Nik Repka]

Hello all:

I'm using code from this snippet: 
http://lists.gnu.org/archive/html/lilypond-user/2011-08/msg00157.html to 
create two marks that are split from one another over a system break.  
Many people on the web are reporting that it works perfectly for them, 
but for me, the two marks remain together.  Here is an example:

%%%%%%%%%%%% multi-mark engraver definition here
\layout {
 \context {
   \Score
   \remove "Mark_engraver"
   \consists #multi-mark-engraver
   \consists "Tweak_engraver"
 }
}



\relative c' { c4 c c c
              \mark \markup{D.S. al Coda}  \break
               \mark \markup{CODA} c c c c }
%%%%%%%%%%%%%


Any ideas what is wrong or how to fix it?  This is a pretty important 
thing to be able to typeset honestly...

Best,

Nik