orig synopsis:
  "Solaris only : Focus in modal dialogs is incorrect"

On Solaris, when a modal dialog is shown, the focus is not given to the first component which can receive focus. Instead a FocusGained event is
delivered to the fist component in the layout. If this component has
its isFocusTraversable() method returning false, no component
in the dialog gets focus unless the user explicitly clicks on
a specific focussable component. Win32 behavior is correct.

I have listed a workaround in the workaround section.