Background color of Choice is not changing properly when items are selected using keyboard in Win XP

Step to reproduce:
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1) Run the attached program.
2) Click or select the Choice. You can see the items of the choice.
3) Select item using keyboard(arrow keys). Has your are selecting the different item in the choice the back ground color has to change, but you can see different colors in different items. It preserves the color of the last selected item of the choice.

If you see the same as described above then the bug is reproduce.

But when you select the item using mouse this works fine.

This is working fine in solaris_10.
I tested this with tiger 1.5.0 FC 64 to mustang b74 & it is still reproducable.