Loss of "Done" button

I have twice done the following. 1. Brought up a specific planet window. 2. Added building a new technology (once -- maybe twice or maybe the first time I added building a new ship. 3. Before hitting the done button, I hit the Turn button. 4. At that point, the Done button was hidden by a ship subwindow, both of which are in the lower right. Nothing I did could fix it. 5. I saved the game. Brought it back up and the game was fine. However, the first time I believe that I had just colonized the planet and had added a ship or technology and then hit turn. In any event, I ended up not owning the planet. 6. In short, the game backs up to before when the error occurred.

Also, one time that I tried to load the game, I got this message "Frequency Over Range" but the game loaded okay. Might be a Windows XP message.