v4.3 RC2 will include all the updates made both branches. There are two important improvements:
- It won't require you to install PostSharp 2.0. This is an option now, if PostSharp isn't installed, it will use integrated one, as before.
- There is DataObjects.Net Project Upgrade Tool simplifying migration from v4.X to v4.3 and helping to reference DataObjects.Net from already existing projects.