When tracking a quest, quest track info is displayed over the minimap. In the attached image, see the yellow text over the minimap. I've dug through every options page I can find and can't get rid of it. If I disable watching the quest in the Carbonite quest tracker window the text goes away, but as soon as I select a quest to watch, the text for it shows up over the minimap.

Becouse that text is not from Carbonite. Try moving Carbonite map to other place. Disable all other addons.