I noticed this when I checked a custom faction I downloaded from somewhere in the forums. I just assumed it was a custom faction that didn't have a homeworld and didn't worry about it. After seeing this post, I checked my current game (1.02) against all custom factions and found that none of them and none of the minors has a homeworld listed. I am the Terrans, and I do have Earth listed as my homeworld.
I will also submit a ticket.
