I have booked and purchased an air-flight ticket through travelnow.com (cheaptickets.com).
A day later they have called me to confirm the purchase.

The ticket ended up to be a ticket with restrictions (travel dates coundn't be changed).
They have ommited to mention this either during the booking process, or on the eticket or
during the call they had with me.
When i have brought this up with them they refused to take any resposability.