I got confirmation from the author directly:

From: James Stewart <james@jystewart.net>
Date: Sat, 24 Nov 2007 12:03:20 +0000
To: Francois Marier <francois@debian.org>
Subject: Re: Distributing XML_Feed_Parser

Hi Francois,

Thanks for getting in touch. I had indeed meant to license it under the
LGPL but must have made a mistake when setting up the package.xml file.
I've just committed a new version to CVS with the LGPL listed as the
license, but guess the package page won't update till I release a new
version of the package.

I'm slowly working on a new version of the package but it'll be some time
before I get it ready for release.

James.