I just booked a reservation for a family member. The e-mail confirmation shows the correct date of the flight, but under "manage my reservations" it says the reservation is for a different date (one day later).

I called CO and their internal reservation system apparently shows the correct date for this flight, but they see the wrong date when they try to put the PNR into CO.com (the CSR was shocked when she saw this). Apparently CO.com support has received several reports of this, and it's a problem with the website, not with the reservations system, so we should be okay.

It's a bit unnerving, however, to see the wrong date listed online...