One line Configuration Boxes

I cant seem to use the enter key to create more than one line in the css configuration boxes in the new Atahualpa 3.4.2 theme. I can do it on other sites I use Atahualpa on. Anyone have some suggestions, see the attached file.
I tried:
- deleting old Atahualpa themes in case the new install was borrowing something from them.
- deactivating and re-activating the theme
- editing in IE7, doesn't work either
Stop press!! Works in Chrome. Chrome show a little handle in the bottom right. This handle is not displayed in other browsers.