I've been having this problem for... uh... well it seems like forever, but I haven't always had it. Basically, when I talk to a race with a 'minor' race portrait, the portrait is stretched wide, except when it is shown during the United Planets.
Here's an example of what I'm talking about...

Notice how our usually thin Thalan offshoot friend has gained a few pounds. I'm not sure about you, but this hurts my eyes.
This also occurs when I first encounter a race using a 'minor' portrait and they say "Hello, we are the so and so's, etc." This does not occur when I use normal race portraits, such as the Terrans and the Korath.
I've tried tinkering with the resolution, but that doesn't seem to help. Any suggestions would be appreciated.