[G_from_G]

My question relates to programming updates.
How often is the programming updated?

Once a program is selected to be recorded -- for instance all new episodes of a program -- and then the program is pre-emped or the schedule changed:
Does it know not to record what is pre-empting the program?
Does it know when to record the program at its new time?

I think that TiVo's program guide is updated several times during the day and if a change in programming happens it knows to change the recording to match the program changge.