1GB PA update-- what is it?

For those of you with faster internet, I'm curious, what is this update for PA that's coinciding with the launch of PA: Titans?

PA: Titans got lot of polisment and stuff like that, those stuff got into original PA as well.

It's titans. There are UI changes and tweaks to base units, but if you have/buy access to the expansion content, it's already been downloaded.

So, am I right the space skyboxes have also changed?

Yes the skybox has changed

There's a giant list of bugs that got fixed that were applicable to both Titans and PA. I'm not sure there's a list of them all yet since we were focused on getting Titans out rather than keeping track of what was also going to fix stuff in PA.

I love the new terrain with choke points.