I upgraded to V27 a week or so ago and went well for several days. However, over the past few days, I've had the phone screen come up as you describe, plus the red indicator is lit, which indicates that the Assist module is unable to pick up a signal.

I've not been to the dealer yet, but I think (read: "hope") that the timing is coincidental and that the real culprit is the Assist/BT module. I have had that replaced once already and wouldn't be surprised if it needs it again.

In my case, often-times, the main telephone screen would come up after starting the vehicle, regardless of which mode was up when I shut the vehicle off. I seem to recall another post on this board describing that the latest Assist/BT module corrects that problem and who knows, maybe it will work better with my Treo 700w.

I plan on taking it in to the dealer over the next few days and will post back here afterwards.