For gnomechat, PANGO_TAB_RIGHT is needed so the usernames are aligned to
the right, while the messages from the users are aligned left (with a nice
vertical line in the middle like in x-chat).

So far, Jimbob (James Cape, author of gnomechat) has been unable to
implement this since pango has only implemented LEFT alignment. From the docs:

typedef enum
{
  PANGO_TAB_LEFT

  /* These are not supported now, but may be in the
   * future.
   *
   *  PANGO_TAB_RIGHT,
   *  PANGO_TAB_CENTER,
   *  PANGO_TAB_NUMERIC
   */
} PangoTabAlign;

Please implement at least the RIGHT alignment option.