People that I know from Toronto and Milwaukee booked reservations on Continental Airlines to vacation in Acapulco back in November. They were to fly into Houston and catch their connecting flight, CO711, at 11:45AM.
This past week they were notified flight CO711 had been moved forward to 9:00AM. This will necessitate there staying overnight in Houston as their first flights do not arrive until after 9:00AM.
Their travel agents are now in the process of attempting to find out if Continental Airlines will pay for a hotel room or are they requiring they spend the night in the airport.
This change is effective on January 5th.