The A380 is a menace to anyone flying behind it or through its wake. Was recently shaken up pretty badly while flying through the wake of a 380 10NM in front of us (and we were in a heavy).
Unfortunately, instead of increasing separation margins ATC is pushing to reduce them and in Europe have done that with the recent RECAT minimums.
Was reading a recent article in the Airbus safety magazine that more or less defended the reduced minimum by saying that they had never seen any major incident on approach as a result of wake turbulence and hence no one had anything to worry about. As for enroute, no one should be worried as the turbulence is sudden and only lasts 10 seconds or less.