Wanting to pick your collective brain – I recently had the hard disk replaced in my TiVo, because the existing one failed. I've noticed that since replacing the hard disk, my unit won't save my video output settings.

I change it so that it outputs 1080i fixed (for some reason it defaults to 576p), but if I turn off my television and turn it back on again (leaving the TiVo on all the time obviously), the TiVo has reverted to 576p. Any ideas what could be causing this?

I didn't think it could be related to the HD replacement, but the only other person I've come across (on the whirlpool forums) who is also having this problem has also recently upgraded to a 1TB hard disk.