Not sure if this really qualifies as  bug or not, but here goes regardless.  I have my television hooked up to my computer and set up as a second monitor.  This doesn't normally cause any problems, but then GalCiv2 randomly started detecting it and decided to complain. Now every time I start up, I get a pair of error messages informing me that my monitor resolution is too low at 640x480 and a similar color error.  The game then proceeds to load completely normally on my main monitor.  Is there any way I can get the game to ignore my television? It's not a major issue, but it's rather annoying.
On a side note, I was told I can use the middle mouse button to dynamically rotate the ship model in the ship builder using the middle mouse button (something like using the LMB on the map).  Since I don't have a middle mouse button, I tried clicking the roller, but that failed to work.  So what button should I be using?