I've started a couple of games playing as Yor with 6 civilizations on a medium map, and they all seem to have the same strange behaviour.
#1 - initially the main screen does not center on the home planet, the cursor shows 0,0, and clicking on the minimap does not seem to work at all to reposition the main map. When I save the game, exit GC2 and reload, the screen correctly centers on the home world, and everything is normal again. I have saved games, but as loading them does not replicate the behaviour I have not sent them. Fog of war is not visible on the main screen, so it is probably positioned outside the map.
I realize the relations screens are far from finished, but still wanted to mention that for the same game setup as above:
#2 - the relations screen comes up with small boxes for 4 opponents filled (Terran, Altarian, Arcean and Torian), with the fifth (Drengin) in the big box. Selecting one of the other 4 moves that one to the big box, and the Drengin disappears, and can no longer be selected anywhere... This can be repeated when exiting from the game and reloading, but is NOT repeated when you reload from within the game (then the screen shows only 4, and no Drengin).
#3 - the relations screen shows only one of the 4 small boxes with a correct red-to-yellow-to-green relations bar (the 3rd one ???). All others have a correct right side (yellow to green) but a black to green bar on the right side.
Let me know if you need the save games.
Noghanimus