Fixed.

The issue was a bit more complicated. If there's a wrong link in the atom feed (for example) we would grab its content for the details, and that content defaults to 'this alert is expired.' And we never update the link.

So now, each time we refresh the alert list we update all of the db values (as needed), and we don't store the details if they are the default expired message (so it will try again with the new link whenever we get one).

Also added a real expiration check anyway, just in case.

Deployed some time ago.