Docbook 4.1 broken?

["Bambang Purnomosidi D. P." <bpdp@3wsi.net>]

Hi,

I update docbook package to 4.1 (unstable), jade, jadetex and then install
docbook book. After that db2pdf can not work anymore when I use an example
from the book for <article>. Here is an excerpt of error messages:

.....
.....
jade:/usr/share/sgml/entities/xml-iso-entities-8879.1986/ISOamsr.ent:21:17:E:
"X2256" is not a function name
....
....

Did I miss some packages? or docbook 4.1 package (or jade, or jadetex)
broken?. Somebody experience this before?

TIA

--
bpdp