MindManager's Presentation Mode has a "Transparent Fade Out" option (seen right). This adds a, sometimes too subtle, fade effect to the unselected branches to focus on the selected topic.
After installing a graphic driver update it started going crazy, with constant redraws as the transparency overlay regenerated repeatedly.
The solution was to disable Nvidia's own nView Desktop Manager window transparency setting in the graphics properties. You can do this globally or for a specific applications as seen below.