Personalities in prominent positions are more vulnerable than most to allegations of wrongdoing. Last week, a slanderous email surfaced in art centres across the world, sent to dozens of top media people and others in the art world. The person under attack is Okwui Enwezor, the Nigerian-born, New York-based director of the next Documenta and the second Johannesburg Biennale. Given that the most serious of the allegations took place four years ago, the email seems malevolently timed to damage Enwezor when he is at the pinnacle of his career - 'The Short Century' opens at PS1 in New York next month, and Documenta, the exhibition in Kassel, is around the corner. The email in its original form was unsigned - but attributed to South African Women against Abuse in the Arts, a group no one we know has ever heard of. Most people who have contacted Artthrob and its editors have been disgusted that, whatever the truth of the matter, this vicious, anonymous email has been clearly planned in its language, timing, and the long list of people to whom it was sent, to cause maximum damage to Enwezor. Hopefully, time will bring clarity and openness where now there are cover ups and rumours - we'll be investigating.