Your Tecplot Linux Ubuntu Unity user interface workspace (e.g., Ubuntu version 12.04) may exhibit translucency, that is, all the open application screens remain visible underneath Tecplot. To disable this translucency you may instruct Linux xlib to manage the colors natively as RGB.
Do this by setting the environment variable in a command line, or in any .bashrc or .profile file:
export XLIB_SKIP_ARGB_VISUALS=1