The stable version for Blender 2.65 has been released. The goal with this build was to make it the most stable in the 2.6 development cycle. And the team managed to eliminate more than 200 bugs.
Fire simulation has been added to the smoke simulator, which also received important improvements touching on performance and stability. Interaction with other simulations should be better now because of the newly added smoke flow force field. Additionally, there is no longer the need for a particle system in order to emit smoke.
Motion blur is now available in Cycles Render, which helps with making moving objects appear more real.
Mesh Modeling has also been improved, as the bevel tool now includes rounding, preserves the requested bevel width more evenly and generating better topology. A newly added tool allows you to make mesh topology and data symmetric.
On this page, you can check all the new features as well as the bugs fixes.