Tab Titles text disappeared!
Hi all, in one (only) of the 15 or so interactions we have in a course, recently converted from Studio 09 to 13, the titles for the tabs simply do not appear. They are all there in the Edit window, numbered as usual, and the tab text is fine. The background for each tab list title is there, it's dark blue so we have a dark blue bar for each tab on the left of the window. See screenshot attached. Clicking on one of these opens the tab text OK. As far as I can tell the font colour is set to white; we have tried all sorts of colour schemes but to no avail.
Any clues? In all the documentation I can find nothing about getting the tab title to show, or changing the text colour.