Mozilla is dropping the idea that some features are point releases and others are major version numbers. As a web browser there's always only been one web, so if a feature is ready then it's ready and it doesn't matter. Internally there's an actual product that other people might interact with -- and Firefox more than other browsers at that, as the traditional way to extend Firefox is to monkeypatch your changes in. But it was never quite so clear what a point release was there either, and it was getting in the way of advancing the core product.
I think simple dated releases would be an improvement (e.g., Firefox 2011.1, 2011.2, etc., or tag them based on month, this one being 2011.10, or 2011v2 or whatever.) But that's basically just a PR move. There's no longer anything really like a point release except in the case of regressions that demand an immediate fix (as happened with Firefox 7).
I think simple dated releases would be an improvement (e.g., Firefox 2011.1, 2011.2, etc., or tag them based on month, this one being 2011.10, or 2011v2 or whatever.) But that's basically just a PR move. There's no longer anything really like a point release except in the case of regressions that demand an immediate fix (as happened with Firefox 7).