$CDATA     = '#CDATA';
...
package XML::Twig::Elt;
...
sub new 
...
    if( $atts && defined $atts->{$CDATA})
      { delete $atts->{$CDATA};
        my $cdata= $class->new( $CDATA => @_);
        return $class->new( $gi, $atts, $cdata);
      }