Nope, this is so people can seamlessly upgrade from the pre-release RPM's to finals. Greg uses a similar strategy with the debs.

One important thing to note about this version number, though, is that it will prevent people running `1.1stable` from upgrading to the nightly/RC releases because 1.19 is viewed as older than 1.1stable from RPM's perspective. This is a change that will only break for this version because going forward we'll be using "proper" pre-release versioning.