I tried to use https://<ip>/nowplaying/index.html to access my Series 2 TiVos and got the following warning from Internet Explorer:
There is a problem with this website's security certificate.
The security certificate presented by this website was not issued by a trusted certificate authority.
The security certificate presented by this website was issued for a different website's address.
I don't recall seeing that the last time I used the web interface on the TiVos.
Is TiVo having a problem with their security?