* List the shared libraries that are used by XS modules in
  README.SLACKWARE.

* _summary_from_pod() does not return summaries for
  Class::C3::Componentised, Debug::ShowStuff WWW::Mechanize::TreeBuilder and
  possibly other modules.

* The Clipboard distribution depends on xclip, which is available at
  slackbuilds.org.  The module's test suite fails if xclip is not installed.