Michael Kifer writes: > So, perhaps 21.4 should use an older ediff package? There is only one set of packages, by design. Not an option without a radical change in policy. > This update was mostly a cleanup, and it is appropriate to use the newer > API. Well, only for Emacs, which abandons support for old versions as soon as a new one is released. XEmacs doesn't do that. Until we make another release, our policy is to support the 21.4 interfaces as they are. We do not intend for you personally to be bound by our policy. If you do not want to deal with the divergence between your version and XEmacs CVS implied by our policy, that's our problem of course. Updating `require' in 21.4 to the 3-argument version used in Emacs and in 21.5 is up to Vin Shelton who is the 21.4 gatekeeper. Vin? It's not a terribly invasive change to 21.4, but it will force upgrades on all ediff users.