DOCBOOK-APPS: iso-lat1.ent:6:19:E: "X00E1" is not a function name error

Hello, I am a technical writer trying to get a docbook publishing system on my PowerBook running MacOS X 10.1. I'm having great success, but I am stuck on the following error: 

/sw/bin/openjade:/usr/local/share/sgml/dtd/docbook/4.1.2/ent/iso-lat1.ent:6:19:E: "X00E1" is not a function name

When I use openjade to generate html from a xml docbook file, I get hundreds of these errors.

I found phillip shelton's thread from november 2000 (http://lists.oasis-open.org/archives/docbook-apps/200011/msg00126.html) about fixing this problem, but I haven't been able to discern what he did exactly to fix the problem. are the error messages just something I have to live with, or is there a way to get them to dissapear? they don't seem to prevent openjade from producing the html files.

thanks for your help,

s

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Sasha Zucker