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Please see the original post here
Changelog may be found here

This one is mainly bugfixes and balance work for the new expansion, but also some base game stuff.

Not a lot to say here except to read the above-linked release notes if you want to know the details. Partly just making this an update-with-blog-post (as opposed to yet another hotfix on the previous forum release thread) to make sure the new blogging system works, etc :)

Update: 7.044 is out to hotfix a bug in the pathfinding amendments (to make it not prefer nomads so much) that basically broke pathfinding in a lot of cases. Whoops!

The Winter 2013 AI War Sortie Bulletin topic at the community hub is a place to find other players.

This is a standard update that you can download through the in-game updater itself, if you already have 6.000 or later. When you launch the game, you'll see the notice of the update having been found if you're connected to the Internet at the time. If you don't have 6.000 or later, you can download that here.