Suspicions remain about Iceage (though one hopes they're just careless, naive or deliberately provocative in their appropriation of white supremacist imagery), but there's no doubt about another Scandinavian musician's neo-Nazi past. A black metal guitarist, presumably? Nope, Ace Of Base's Ulf Ekberg. Apparently he used to be in a charming outfit called Commit Suicide and has declared himself to be "profoundly regretful" about his former associations.
(Thanks to Dan for the link.)