I set the Backdrop to Dates, and I view "Today's Agenda". When I turn off my Apple MessagePad, then turn it on the following day, the date is correct but the unchecked items in the To Do list do not roll over.
This issue is known and being investigated by Apple. The workaround when this occurs is to select Show Today.
This article was published in the "Information Alley": Volume II, Issue 19, Page 17