The event title will not display if the foreground (font) color is the same as the background color. To fix this:
1) Go to Calendar ---> Add Lesson/Event
2) Click the link "Edit Categories"
3) Click "Edit" next to the category you need to change
4) Change the foreground color to something other than white. You can click the box on the right to bring up the color chart.
5) Click "Submit"
6) Click "Finished updating categories"
7) Click "Return to calendar" on the right sidebar.