I have a bunch of swing buttons loaded on to the stage. When the UI comes up, tab traversal works properly. All compoents are gaining focus. I am changing the opacity of some of the components and then reverting back to opaque. After this, those components are excluded from focus traversal cycle.

I reproduced it on WinXP - JavaFX SDK b42 - jdk6u10-b33.

I have attached a sample code. Run it. Check the focus traversal. Now move the slider to 0 and move it back to max. Now try traversing through the components.