Docbook related build errors: libgnome, ORBit

I get docbook related build failures when trying to build libgnome and ORBit - any suggestions: gnome-score.c:209: warning: ignoring return value of 'truncate', declared with attribute warn_unused_result I/O error : Attempt to load network entity http://docbook.sourceforge.net/release/xsl/current/html/chunk.xsl warning: failed to load external entity "http://docbook.sourceforge.net/release/xsl/current/html/chunk.xsl" compilation error: file /usr/share/gtk-doc/data/gtk-doc.xsl line 6 element import xsl:import : unable to load http://docbook.sourceforge.net/release/xsl/current/html/chunk.xsl -- Ivan Gyurdiev <ivg2(a)cornell.edu&gt; Cornell University