Comment 5 for bug 310882

A small update on this issue.
I also see the error about missing hyphenation pattern but fop doesn't crash in my case. And there is a PDF generated.

I am using following command:
$ fop -xml flumotion.xml -xsl /usr/share/xml/docbook/stylesheet/nwalsh/fo/docbook.xsl -pdf flumotion.pdf

Output:
1 Feb, 2009 3:38:07 PM org.apache.fop.cli.InputHandler warning
WARNING: javax.xml.transform.TransformerException: Making portrait pages on A4 paper (210mmx297mm)
1 Feb, 2009 3:38:07 PM org.apache.fop.cli.InputHandler warning
WARNING: javax.xml.transform.TransformerException: Read /usr/share/doc/docbook-xsl/README.Debian section 5(a).
1 Feb, 2009 3:38:11 PM org.apache.fop.fo.flow.ExternalGraphic bind
SEVERE: Image not available: url(figures/fluendo.png)
1 Feb, 2009 3:38:12 PM org.apache.fop.hyphenation.Hyphenator getHyphenationTree
SEVERE: Couldn't find hyphenation pattern en

Can you please confirm if this is the case on your side as well? If it is then your error is something else. May be the error is related to the PNG image you are using since I don't have the png image on my machine.