As an interesting aside, Air France also increased fuel surcharges today, albeit by only 4 Euro for longhaul with no increase for short and mediumhaul flights. The leaves AF fuel surcharges still quite a bit below those of KLM:
Longhaul: AF - 48 Euro vs KL - 55 Euro
Europe: AF - 12 Euro vs KL - 22 Euro
Any reason why these numbers are not equal for both companies?
One thing is sure... Working in an airline myself, I can assure you that fuel surcharges are good business for the airline.