No, you will not. Full stop. And for Mr Blyth: Royal Caribbean Cruises Ltd. Voluntarily Revises Fuel Supplement MIAMI, March 10 /PRNewswire-FirstCall/ -- After working closely with the Florida Attorney General's office, Royal Caribbean Cruises Ltd. today announced it has voluntarily agreed to eliminate its fuel supplement on any bookings made prior to the announcement of the fuel supplement on November 16, 2007. Royal Caribbean will eliminate the fuel supplement for any guests who had a booking made prior to November 16. Guests booked before November 16 who paid the fuel supplement and have taken their cruise will receive a refund through the form of payment used to purchase their sailing. Guests booked before November 16 who paid the fuel supplement and have not taken their cruise will receive their refund as an onboard credit during their sailing.

It is possible but most unlikely if you have paid your final invoice.Cruise company's seem to keep their part of the deal unlike the airlines,Do not worry about it to much?

So far as I am aware only Carnival have done a retrospective charge but the rest only on bookings made after the 1st February, 2008. I gather there was to be an investigation into the fuel charge issue by the State of Florida but never heard what the outcome was, other may comment further on this.