I am not sure what you mean by "addressed"? There is new functionality in the Corona Sky, which means any scene created with a new Corona version may not load and work as intended in an old Corona version - there is nothing to "address" there, as old versions can never handle new functionality, not just with Sky but with any other feature. Of course scenes from earlier Corona versions should load and render as intended in the newer Corona version, which is the important part :)
So this warning is just to tell you, don't save a scene using the latest version if you for any reason will ever ever go back to an earlier Corona version.
Oh the bit that should be addressed is, if you have multiple Corona installs at once - we'll have to keep two versions of Sky installed :)
