3.5.1 Ancient notation template broken

[Graham Percival]

The ancient notation template seems to be using a percussion staff.  I  
can't
see anything obviously wrong in the template; could somebody familiar
with ancient notation look at it?

http://lilypond.org/doc/v2.5/Documentation/user/out-www/lilypond/ 
Ancient-notation-templates.html

Cheers,
- Graham