Skip it! by altering your wanted sub:

sub wanted {
  if ( (stat $_)[9] > time() - (86400 * 1) ) {
    return if /^\.\.?$/;
    print "<img src=\"$photo_url/$_\" height=150 width=150><p>\n";
  }
}
[download]

This skips the . (and ..) directory entries.

-- Hofmator