I occassionally run into problems using the DD/MM/YYYY notation for dates on co.com. Today it was when trying to set up flight alerts for a just-booked trip. When I entered the date "02/07/2008" I received the error:
Only dates between 23 Apr., 2008 and 26 Mar., 2009 can be accepted for the Depart Date. Please modify the Depart Date and or Depart Date Time.