4 days? That was fast!
Andrew has been fixing the bugs you reported since 0.9.8 came out, thanks for all your reports! We are especially thankful for @KellyNyanbinary, she made a very detailed bug report that made us find a very important problem in our physics engine. We have fixed the problem, but now the behaviour of existing crafts may have changed, especially in those that have many stages or that detach things (like custom made missiles). Please, check your crafts and make sure they are still working as expected. If they don't we are really sorry but don't report it as a bug unless anything weird happens. We are aware of the annoyance of such a change, but this should make the game more realistic and stable from now on.
On top of that, I've finished updating the textures in all the celestial bodies of the system, with some of them seeing a refresh in their biomes and terrain; and I've added a new, more detailed skybox, for all of you making telescopes to spot all the constellations in the sky.
Sadly, we didn't finish the new base in time and we want this update to come out now so we can start working on 0.9.9, which will come with some necessary tweaks and features to start getting ready for career mode. This lack of time and some great feedback we got from the community in the SimpleRockets Chat Discord Server made us realise this base has a lot of potential and deserves more time to get it right. Sorry for the inconvenience, in case you want to visit the demo, we are leaving it in place with some tweaks to make it more usable, such as ramps and rails. We also fixed a bug that made all launch locations point south, so you can save your own in the new base demo and use its runway.
As per usual, you can find all the changes in the full release notes.