I have a question for you Calibre gurus. I've just started using the Ubuntu version of Calibre on my netbook. I'm frustrated by the balloon pop-ups that appear when I move my mouse over an icon. They have a light-blue background and white text. At best I find them hard to read. Sometimes I can't make out the words at all especially when there is low ambient light. Does anyone know if there's a way to change the colour of the font, say, to black.
