In disabled JComboBox the drop down button background color is not similar while comparing with native ComboBox.
In native ComboBox the drop down button shows the gray color and looks disable but in JComboBox the drop down button shows the black color and looks enabled.
Please find the attached images for identifying the variations between two.
Its a regression from b96.
java version "1.6.0-rc"
Java(TM) SE Runtime Environment (build 1.6.0-rc-b104)
Java HotSpot(TM) Client VM (build 1.6.0-rc-b104, mixed mode)
Vista Build No: 5840
Vista Theme: Default Theme(Aero)