I am hoping that some UI bugs I've found will be fixed before the final release, or in a patch very shortly after. They are mostly minor things that don't affect gameplay too much but lack proper polish.
In no particular order:
- Playing with more than 12 races causes improper/funny text in the diplomacy screen

- construction vessel with a survey module attached to it is unable to click "Construct Starbase"; you can still build one with the hotkey B though

- I sometimes see opponent ships through explored areas that are now covered by FoW... unclear how but it's been reported before
- the Fullscreen option within the game options doesn't appear to work correctly, or do anything. I am able to move my mouse outside of the game window while the Fullscreen option is selected, and when it isn't selected I get the same behaviour (though this time I would expect it). This is while using a dual-monitor setup with an nvidia card and updated drivers.
- not really a UI bug, but I am unable to find a way to add a fifth branch to a custom tech tree. When I attempt to, most of the time my game will just CTD on map generation, unless I make each of the custom techs in that particular branch ResearchCost 0 (aka free and non-researchable).
- the Preparedness Center improvement gives way too much bonus resistance to leveled/surrounding improvements; in many cases I can have planets with over 500% resistance.