Disabled MenuItem gets selected , when i navigate using arrow keys. but in native the disabled menuitem does not get selected , but eats keystoke(can travel through the disabled menuitem).

Step to Reproduce:
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1) Run the attached program.
2) Click on 'Menu2' Menu. you can see 'MenuItem2:1' Menuitem which is disabled.
3) Use 'Down Arrow' key to get the focus on 'MenuItem2:1' Menuitem. you can see the disabled menuitem gets selected with blue color. I have attached a screen shots of the same. If you the same , then the bug is reproduced.

I compared this scenario with the native as follows.
Press ALT + space to get the frame menu. you can see that 'Restore' Menuitem is disabled, try navigating using keyboard, the menuitem eats keystroke , but does not selects the menuitem.

I tested this on Vista beta2 (build 5342) on Mustang b81.