Build Info:
java version "1.6.0-rc"
Java(TM) SE Runtime Environment (build 1.6.0-rc-b97)
Java HotSpot(TM) Client VM (build 1.6.0-rc-b97, mixed mode, sharing)

When a scrollbar's thumb reached it's minimum size, the vertical border's of the ScrollBar's thumb is not rendering properly.

- Run the attached sample test.
- A frame with a JTextArea displayed...
- Just starting type something continuosly, just to make the Horizontal scrollbar's thumbs gets into the minimum size
- Now you can notice that ScrollBar's thumb's right border is not repainted properly.
- While you are typing, at one stage you can't see both the left & right borders are not displayed properly.

Please see attached screen shot vista_xp_scrollbar_thumb image, in that lower one is XP and upper one is Vista. You can see the difference on the Horizontal ScrollBar's thumb.