This is repeatable, and has crashed the game every time:
When you get your weekly report about ships built, zoom to a planet that has completed a ship.
Go to your shipyards from the zoom. Design a new ship.
Try and save it: The save ship thing won't pop up. Click done, say "Yes" to ending without saving the ship.
The save ship box will be on the main screen, alone.
Name your ship, and save it.
The game will commit a critical error and crash.
This has happened to me a few times, and though avoidable (and fairly specific), I seem to forget it does that, and have doen it twice so far. Anyone else run into this?
Another bug I've run into: Sometimes, even if I have the exact same ships, they won't form into a fleet. I have the propper amount of logistics and everything, but for whatever reason, some ships absolutely will not join a fleet. Sorry I don't have anything more detailed.