Checkbox state change generates 2 itemEvents on WindowsNT, one on Solaris

The attached application brings up a checkbox.

Each time the checkbox is clicked, 2 itemEvents are delivered on
Windows NT, while only one is delivered on Solaris.

To recreate the bug, run the attached application and click on the
checkbox that comes up.

The following output is produced on each of the platforms when the
checkbox is clicked.

Output on Solaris:
gauri@apollo> java ChkBox
State Changed: java.awt.event.ItemEvent[ITEM_STATE_CHANGED,item=Merlot,stateChange=SELECTED] on checkbox0

Output on Windows NT:
F:\jstuff\ChkBox>java ChkBox
State Changed:
java.awt.event.ItemEvent[ITEM_STATE_CHANGED,item=Merlot,stateChange=SELECTED] on checkbox0
java.awt.event.ItemEvent[ITEM_STATE_CHANGED,item=Merlot,stateChange=SELECTED] on checkbox0