Just opened up a project in Xcode 4.3, and was instantly informed of all kinds of new warnings. Most of them were pretty harmless, like "void" on declaration but "IBAction" on implementation, easily fixed. But there is one that I can't figure out how to correct while still maintaining what I want.
Warning message is:
Category is implementing a method which will also be implemented by its primary class
It's pointing at methods in a category that are intended to be private, and are declared in a class extension within that category. It's also flagging some 3rd-party code, so I'm not the only one apparently doing this wrong.