Interestingly the bug links to 163267, which is marked private (i.e. a security issue). I've had more downtime out of Google in the past few years than I ever did out of my Yahoo mailbox.
http://fastmail.fm
/biasIf she wanted it done, it'd already be done.
While you are on that page, enable SSL by default: Turn on SSL: Check "Make your Yahoo! Mail more secure with SSL"