tabs invisible since upgrading
SInce upgrading iTunes, the tabs in my course page are invisible. They are there and can be clicked on if you get it just right (like they are flattened out or obscured behind the scroll bar), but you can't read them and so no one can tell which folder is which. I also cannot access the edit tab when I want to add a new tab. I haven't found any menu item to fix this or any way to reformat or move borders around to make them visible again.