My few bugs so far, all as the Arceans.
I had a fleet with 4 moves randomly go down to 1 max moves for a couple turns. I did save a game titled 'bug arcean' or something along those lines when I noticed it so I can furnish that savegame if requested. A few turns after I saved the fleet went back to 4 max moves - no combat had happened and no ships had joined or left the fleet.
My medium hulled ships have 4 moves as they have 1 engine and then the speed bonuses from researching down that tech tree. I built a large hulled ship, and put the +3 fleet speed warp bubble on it, along with two engines. When first built, these ships individually had 8 speed total. I've teamed them up with other ships (my medium hulled ships and some ships the terrans gave me to fight the drengin, both 4 moves) and when teamed with my medium hulled ships they correctly adjust down to 7 moves (4 from the medium ship plus 3 from the warp bubble, moving at the max speed of the slowest ship). However, when teamed with the terran ships their fleet speed is a flat four. Apparently they're not giving the fleet speed bonus to the terran ships, even though they're under my control.
I've not personally run across numbers 4 or 5 that Steve mentioned above. GNN only ever says a planet is done when it is done for me. I'm playing on medium if that has any bearing on things.
Also, as dethadder notes, I've not seen any pq 1 or 2 planets in either beta (not asking for them back, though

). I have, however, seen plenty of the special types that I've had to research to colonize in both betas.