I've given the area around Copenhagen, Denmark, quite some love over the past few days. The biggest change was that I downgraded all the roads which were incorrectly tagged "secondary" to "tertiary". That's not only how it's supposed to be, the map actually looks much better. Besides, I have made lots of little detail corrections. I've used http://openstreetbugs.appspot.com to track them. If you live in the area and see an error, feel free to report a bug on that site - it's very easy!