First off, Great game so far, but here are the bugs i've noticed....
At least one cosmetic attachment causes ALL hardpoints to disappear, while at the same time not actually showing up.
Some cosmetic attachment icon/previews don't match what the actual attachment looks like.
Saving custom made attachment combos doesn't work right all the time. When I click on the pre-made combo to add to the ship, parts will be missing.
With the design gizmos option clicked, modifying one option will sometimes mess up another. IE, if I change the size ratio of a piece, then move it's position, the size will jump either bigger or smaller. Then, with the proportional scaling unselected, if I adjust the (for example) Z length, it'll adjust all the sizes proportionally.
Mirroring an object, then adding a piece to the mirrored part, sometimes causes my whole system to halt and I have to do a hard reboot.
The list of sponsors in the shipyard management screen scrolls way to slow. Either enlarge the window, allow a faster scroll, or allow arrow keys to be used to cycle through the various planets.