Apologies. The painting of the icons was a red herring.

I now believe that my problems are the result of using the com.sun
KeyNavigateBehaviour. From looking at the source code, it seems to wake
on every frame. Consequently, it means the cpu is running at 100% and
there isn't time to do anything else - like paint greyed out icons.

I know that Sun only provide the code for illustrative purposes but...

I guess my question now is: why does the keyNavigateBehaviour need to be
awoken every frame?

-Paul

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