American Physical Society now leaves copyright with authors for derivative works

Editorial: APS now leaves copyright with authors for derivative works
http://link.aps.org/abstract/PRD/v78/e080001

"When you submit an article to an APS journal, we ask you to sign our copyright form. It transfers copyright for the article to APS, but keeps certain rights for you, the author. We have recently changed the form to add the right to make 'derivative works' that reuse parts of the article in a new work. The importance of this change is discussed below."