JXTaskPaneContainer Background Color
(I'm aware there is a question from 2006 with exactly the same title, but the solution doesn't work).
I have a JXTaskPaneContainer in my app - I'm developing on OS X Lion - and it insists on having a light gray background colour. I have specifically set the Color property to be null, so that it will inherit from its parent, but all that does is make it white and not the dark Apple gray colour.
How can I turn off any attempt by this component at trying to be smart about its own colouring?