The acts heretofore passed supplementary to an act entitled “An act for the acknowledging and recording of deeds,” shall be taken and construed to include and authorize the recording of any release of a legacy by writing, signed, acknowledged or proved in manner to authorize the recording of any other writing or deed, although there may be no subscribing witnesses thereto, or but one such witness, and all releases heretofore signed, executed and delivered, which would be comprised in said acts are¹ hereby construed, may be recorded, or, if recorded, shall be taken as validly recorded, and as such be received in evidence: Provided, This act shall not affect any judicial decision heretofore rendered, or to be used in any case now pending in this commonwealth.