Please update to beta version 3a and see if the problem happens again.  

A couple questions:

1. How many starbases already exist in the sector?  You are only allowed 4 per sector. (you should get a message about this though)

2. Does it happen every time?  Is it something you can reproduce?

3. Can you save the game, load the game, and reproduce the problem?  If so, please zip that save and send in your zip to gc2bugs@stardock.com with a brief description of the problem.

4. Please post the contents of your debug.err file.  It can be found in /my documents/my games/gc2twiligharnor.  You can use any text editor (like Notepad) to open the file.  Copy/Paste the contents here.

Thanks.