Geoff Shackelford's site pointed me in the direction of this piece in the Providence Business News.  Acushnet - on the heels of losing its appeals against court-mandated injunctions stopping sales of ProV1s that violate patents owned by Callaway - is recalling the golf balls that don't conform to its new standard of manufacturing the ball in a way that does not conflict with the Callaway-owned patents.

Acushnet Co., the golf business of Fortune Brands Inc. (NYSE: FO), is asking retailers to exchange any “nonconverted” Titleist Pro V1 and Pro V1x golf balls that remain on their shelves after tomorrow.

The voluntary recall is related to the company’s ongoing legal dispute with Carlsbad, Calif.-based Callaway Golf Co. (NYSE: ELY), which claims that Acushnet’s Pro V1 balls violated Callaway patents for multilayer golf-ball technology. “Callaway Golf believes it is time for Acushnet to accept its losses in court,” Steve McCracken, the company’s senior executive vice president and administrative officer, said in a statement last week.

The recall really isn't voluntary.  The balls will have to be destroyed in some fashion no matter what.  May as well enjoy it at Acushnet.