The 3.6.x series is still based off of a same stable code tree that 3.6.9 came from. In other words, it's just a basic progression of the code. Nothing big, nothing fancy, just a few neat little things and quite a few bug fixes. There were also some things that were slated for 3.6.9 that didn't make it, and those are going into 3.6.10 instead. There will also be a 3.6.11 at the end of the year, also from the stable tree.
These 3.6.x series of builds is our attempt to bring some stability to the project. This makes it easier for mods to get new features and get bugs fixed, but without having to do a major overhaul of their data to make it all work. 3.6.10 is going to be data compatible with 3.6.9, so mods shouldn't have to change anything to make it work with the new build, unless they want to take advantage of some of the new features.
3.7 is going to be a HUGE break from the norm. It will require some mod changes (for some mods anyway), it will move from the registry to ini files, it will be a new launcher, it will be new input and message handling code, it will be a completely rewritten pilot file core, it will be even more cross-platform friendly, it will a largely restructured graphics back-end ... and much more. That is going to be a big deal and it's going to cause people (both us and you) to make some serious changes. So, although it's going to be a pretty great thing (we hope), don't rush it. Just rely on the relative stability from the 3.6.x builds for the next 8-10 months, then will start with some serious 3.7 builds.

- reduced memory footprint (by about half)
how'd you pull that one off?
I'm friggin awesome. Obviously.
