Since we started selling the machines, this rumor has persisted, inexplicably. The rumor is wrong on all counts, four blades works splendidly, thank you. The character of the aircraft is that it has some 4R vibration on the ground, especially in moderate winds. This can be relieved by raising the collective a bit, especially during taxi.
Warning, Commercially tainted paragraph follows:
Reports attribute the rumor about 5 blades to French salesmen who can't seem to sell the aircraft they have, the with one too many blades and not nearly enough performance for the price.