The "Assign" button doesn't turn off if you click on it. This happens only in
menu "Option" Tab "Security" in Windows Mail in Windows Vista. This also
occurs in Outlook Express 6 in Windows XP.



Reproducable steps:

Goto Windows Mail
Goto Menu "Tools"
Choose "Options"
Choose tab "Security"
If you click on the "Assign" button the active button "Assign" doesn't go to
inactive (light gray).