I've been using Linux Mint 17.1 for quite a bit and its configured to using the fglrx driver.  When I first installed Cairo-Dock as a way to emulate Ubuntu's Unity, there had been Missing text and captions on several items in my menu.  It's bothered me but I've tolerated it for a long while till I had had enough and did some research on it. This thread gave me a hint that this is a known