It looks like I have just received a TiVo update!
The problem is that it just occurred during our nightly TV watching....
At 8:50 the TV went black. After a moment of awkwardness a TiVo startup screen. Then a 'just a few minutes' screen showed up. After waiting way too long the TiVo Startup Movie played. Afterwards the TiVo was back to normal.
Weird, has this happened to anyone else?