That story has been very much in the news in the rest of Scandinavia as well:
Derfor vil Madeleine ikke betale bøde: Kongelige må da gerne benytte busbanen - Royale | www.bt.dk
Kongelig trafikbøde: Prinsesse Madeleine stoppet af politiet - Udland | www.bt.dk
Very short: During a traffic congestion in Stockholm Madeleine drove her car into the buslane, where she was stopped by the police. The normal sanction is a fine of 1.000 SK. However Madeleine was unvilling to accept the citation, because there is actually an exemption for royal vehicles on official duty - in connection with statevisits and similar functions, where royal cars have dispensation to use buslanes just as taxis have.
However, Madeleine was alone and even though she was driving one of the royal cars, it's a bit difficult to define this as official business.
A somewhat unfortunate situation, which Madeleine could have gotten out of easily, simply by paying the fine and leave it to the experts to figure out and discuss afterwards whether she really had broken any rules.
That combined with half the wedding ceremony taking place in English and Chris O'Neil saying "I do" instead of "Ja" in the church has apparantly caused some annoyance in Sweden.
IMO this hasn't been handled very elegantly at all. Madeleine traffic-screw up and her reaction can be attributed to wedding nerves and the fact she is stressed. Fair enough.
So why not go that way?
I'm also a little surprised that SÄPO (Security police) isn't following her around. That would have closed the case. Has her bodyguards been withdrawn even when she is in Sweden? Baffling I'd say, since she is so high profile, especially these days.