I doubt there is any particular issue with regard to the departure charge, Ryanair and IWAK have always just agreed to disagree on that one and it hasn't prevented Ryanair expanding their route network before.
Anyone know what kind of aircraft Air Méditerranée are using for their charter flights today? They have three departures on the board, I don't know if its the same plane ferrying over and back to France or if there are multiple flights? The additional charters will make for a very busy departure lounge today though in additional to the regular scheduled services.