This whole "curse" business just goes to show that in the theatre, as in the rest of life, bad things happen around superstitious people. You could say that I am very superstitious about superstitious people, as the catalogues of disaster they seem to command are quite extraordinary. If you meet one, I can recommend performing the cleansing ritual of spinning widdershins thrice, then applying your fist firmly to the offender's nose. Otherwise you might end up as just another statistic. On the other hand, I understand that encountering two such individuals is a good omen.
As to the play itself, I will only add that Akira Kurosawa directed a masterful Japanese adaptation, which goes by the name Throne of Blood in English.