Someone

C/gnome-commander.xml:2510: parser error : Entity 'equiv' not defined
                    <para><guilabel>(start_index)</guilabel> &equiv; (start_inde
                                                                    ^
C/gnome-commander.xml:2513: parser error : Entity 'equiv' not defined
                    <para><guilabel>(start_index,length)</guilabel> &equiv; (sta
                                                                           ^
C/gnome-commander.xml:2962: parser error : Entity 'deg' not defined
        <entry><para>Rotates the image 90&deg; (applicable only in IMAGE display
                                              ^
C/gnome-commander.xml:2966: parser error : Entity 'deg' not defined
        <entry><para>Rotates the image 270&deg; (applicable only in IMAGE displa
                                               ^
make[2]: Entering directory `/var/tmp/portage/gnome-extra/gnome-commander-1.2.3/work/gnome-commander-1.2.3/doc'
xsltproc -o gnome-commander-C.omf --stringparam db2omf.basename gnome-commander --stringparam db2omf.format 'docbook' --stringparam db2omf.dtd "-//OASIS//DTD DocBook XML V4.1.2//EN" --stringparam db2omf.lang C --stringparam db2omf.omf_dir "/usr/share/omf" --stringparam db2omf.help_dir "/usr/share/gnome/help" --stringparam db2omf.omf_in "`pwd`/./gnome-commander.omf.in" `/usr/bin/pkg-config --variable db2omf gnome-doc-utils` C/gnome-commander.xml
db2omf: Could not construct the OMF maintainer element.
  Add an author, corpauthor, editor, othercredit, or publisher
  element with the role attribute set to "maintainer" to gnome-commander.xml.
make[2]: *** [gnome-commander-C.omf] Error 10
make[2]: Leaving directory `/var/tmp/portage/gnome-extra/gnome-commander-1.2.3/work/gnome-commander-1.2.3/doc'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/var/tmp/portage/gnome-extra/gnome-commander-1.2.3/work/gnome-commander-1.2.3'
make: *** [all] Error 2