After installing version 3.01, using Chrome:
Saving Build your own color scheme settings deletes Custom CSS, content of Any Additional CSS box.
Saving Custom CSS reselects the Default color scheme radio button and deletes custom colors entered from the color pickers.
Solution: I added a SocratesChildTheme for the CSS and used the Styling page only for a custom color scheme.
The Sample Child Theme is fine. Appreciate the nice screenshot.jpg image. In WP-Admin/Socrates panel title, the small Socrates icon image link broke, so I copied IMsm.png to a new images folder in the child theme.
Except for this one glitch, upgrading had no other problems.