Any deed executed by, or any other official instrument executed by, an administrator, executor, guardian or officers of said court, affecting and relating to any title of real estate, pursuant to proceedings in the probate court of Riley county, Kansas, prior to July 12, 1951, which deed or other official act executed has been recorded in the office of the register of deeds, is hereby confirmed and validated and the title conveyed by any such deed or any other official instrument, executed by any such officer of said court, affecting and relating to any interest in real estate is hereby declared to be merchantable to the extent of the interest conveyed, or to the extent of any interest affected by an official act executed by any said officer of said court: Provided, That any person desiring to present proof of the invalidity or partial invalidity of any such deed or such official act, or such proceedings shall have one (1) year after the effective date of this act within which to bring proceedings attacking such deed, such official act or proceedings: And provided further, That infancy, incompetency, or nonresidence shall not affect the operation of this act.