vista: JRadioButtonMenuItem is not properly rendered.

Step to Reproduce:-
-------------------
1) Run the attached program in windows LookAndFeel.
2) Click on 'Edit' Menu .
3) Click on 'Options' Menu. Observe that 'Forward' JRadioButtonMenuItem is not in round or not matching with native look And feel. I have attached a screen shot of the same.


 OR

1) Run SwingSet2.
2) Click on LookAndFeel Menu.
3) Click on windows 'LookAndFeel' MenuItem. Observe that JRadioButtonMenuItem is not in round or not matching with native look And feel. I have attached a screen shot of the same.
I tested this on Vista beta2 (build 5342) on Mustang b81.