Apple does this, too. Not just on password change forms, but on login forms. Drives me nuts, as I use a password manager and my passwords are 24 characters of garbage.
Edit: Apparently I can't reply to the next comment, but keepassx also has the feature that passwords are cleared from the clipboard after 30 seconds.
Edit: Apparently I can't reply to the next comment, but keepassx also has the feature that passwords are cleared from the clipboard after 30 seconds.