The DTD referred-to by the XML export version 2 is ill-formed: The file at
contains lines like
<!ELEMENT feature_news (#CDATA) >
<!ELEMENT feature_forums (#CDATA) >
<!ELEMENT feature_docman (#CDATA) >
<!ELEMENT feature_tasks (#CDATA) >
which are syntactically incorrect, because #CDATA is not the correct keyword - it should be #PCDATA in all cases.
This causes problems when parsing the exported data: most parsers will access the DTD (even if they don't validate), and then complain that the DTD is ill-formed.