There are now three different versions of the Movable Type Publishing Platform: Commercial, Open Source and Personal. And with the newest version of Movable Type in Beta, release v4.1, there's and interesting change of orientation deep down in the product's core.With the recent release of the Movable Type Open Source incarnation, it's probably not a big stretch to think people are wondering why pay when there's a free version available? According to the company's website, the Open Source License has all the features of the 4.0 Commercial License, and a little bit more.Movable Type 4.1 is now in beta and the list of fixes and enhancements is rather huge. What's notable is that many of these enhancements are making their way into the Open Source and Personal Licenses, as well as the Commercial version. That's not to say the versions are equal. Of course they mustn't be.