Not sure if these are bugs or intentional...
When you colonize a planet with the Tarib species, and they revolt, the icon for the revolting pops is the same as the normal one, unlike the other species.
I understand that they are probably silicon-based life forms, and that facial expressions are probably not their thing, but at least their 'eyes' might glow red or something...
Another thing, and I admit this is a nitpick -
When fired, torpedoes have a greater range per turn than missiles of the same type, yet their movement animation is slower. If we assume that a single turn represents a certain fixed amount of time, this doesn't make much sense. It could be reasoned that the torpedoes are more massive than missiles, and so move more ponderously, but then they should have a shorter range than missiles, or it could be argued that because of their greater size they have more powerful engines, and thus move faster, but then their animation should be faster than the missile one, not slower...