org.apache.forrest.plugin.input.dtdx broken links

[Kevin]

Using 07-dev and building plugin

org.apache.forrest.plugin.input.dtdx
forrest site

Seems to generate a working site but get BROKEN on all dtdx links in 
site.xml

e.g.

X [0] status-v13.dtdx.html  BROKEN: org.cyberneko.dtd.DTDConfiguration

Link rewriting seems ok any ideas?

Thanks

Kevin.