DOCBOOK-APPS: programlisting problems

Hello,

I post this a second time, I did not get my first mail back from the
list, so I guess its lost...

The funcsynopsis decoration problem is solved (I had the define 2
times in my *.dsl, and it seems only the first is evaluated, and not
overwritten by another one.)

DocBook4.1 on Debian.

First with:

<programlisting>
X
Y
Z
</programlisting>

Produces in HTML and PDF:

----------------- grey box ----------------------
1 X
2 Y
3 Z
4
-------------------------------------------------

Line "4" is too much.

How do I get rid of that extra line?

Any hints (also maybe better ways to include (python) listings) are
very welcome.

Thanks,
Carsten.