Polyurethane Balls in Flour

Courtesy of The Urethane Blog, a US flour company (Wegman's) is recalling bags of flour because they may contain "blue polyurethane balls". I'm not sure what size the balls are, and consequently how noticeable they are. The balls are used in the sifting process, so I'm guessing that the mesh that was supposed to retain them broke and let them pass.I doubt any serious harm would come of this contamination unless the balls are so small that they could be baked into say, a batch of brownies […]