In JDK-1.2fcs-F on Solaris 2.6 the SwingSet Colorchooser will display a blank large color square in the HSB panel if you follow a certain series of actions.

Steps to Reproduce:
0) Launch SwingSet with the above configuration.
1) Bring up the ColorChooser.
2) Change to the HSB panel.
3) Move the cursor in the large color square to pick a color.
4) Click the H S B radiobuttons repeatedly.
RESULT: After 4-6 H S B choices the large color square will go blank with the cursor still visible in it. The choice after that will bring the color back.