This video is an excerpt from a Let's Play I'm doing on YouTube so SPOILERS for that. It shows and details an Invader Casualties Population Bug that has been in the game awhile now. Game started with v1.033 (not mentioned as fixed in 1.1. notes)
If you want to check out the full Let's Play for more bugs, constructive criticism and whooping of Suicidal AI links below.
Playlist: https://www.youtube.com/playlist?list=PLHMuUHsmNFlQEvNuuDLZ2uBLJ0HNEY2si
My channel: http://www.youtube.com/user/MacsenGaming
Macsen.