I had a more in depth look at the ubuntu bug that was linked to. The workaround for Java windows was done in compiz. If you extrapolate that to xfce then the same fix should probably be done in xfwm rather than in the window buttons panel plugin.
I had a more in depth look at the ubuntu bug that was linked to. The workaround for Java windows was done in compiz. If you extrapolate that to xfce then the same fix should probably be done in xfwm rather than in the window buttons panel plugin.