Well it's all channels - digital and analog - (and I am using 2 CableCards), but as soon as I select "guide" on the remote, the channel tunes in. And if the TiVo is doing it itself (i.e. Season Pass), it seems to tune in fine. Before I upgraded, none of this happened (though I did then have the duplicate channel which wouldn't tune in issue, but not now).
It's every time I manually change channels I have to re-select "guide" to get it to actually tune in...