lines 598-614

  print a({-href=>'./playlist.m3u?Play+All+Recursive=1'},
      img({-src => $self->cd_icon($dir), $self->aleft, -alt=>
          $self->x('Stream All'),
          -border=>0})),
        $links,
    a({-href=>'./playlist.m3u?Shuffle+All+Recursive=1'},
      font({-class=>'directory'}, '[',
        $self->x('Shuffle All'),
        ']'
     ))
    .' '.
    a({-href=>'./playlist.m3u?Play+All+Recursive=1'},
      font({-class=>'directory'}, '[',
        $self->x('Stream All'),
        ']'
    )),
    br({-clear=>'ALL'}),;
[download]

lines 1237-1243

    my $mime = $self->r->lookup_file("$dir/$d")->content_type;

    push(@directories,$d) if !$seen{$d}++ && $mime eq DIR_MAGIC_TYPE;

    # .m3u files should be configured as audio/playlist MIME types in 
+your apache .conf file
    push(@playlists,$d) if $mime =~ m!^audio/(playlist|x-mpegurl|mpegu
+rl|x-scpls)$!;
    push(@txtfiles,$d) if $mime =~ m!^text/plain$!;
[download]

lines 1887-1890

sub supported_type {
   my $self = shift;
   my $type = shift;
   return $self->{'supported_types'}->{$type};
}
[download]

You shouldn't worry too much about those warnings, they mostly mean $dir and some $dir derived values are undefined at some point (probably means the requested directory doesn't exist)