This evening novair 9007 circled Stockholm-Västerås airport for probably more than an hour. Flightradar had no destination so I assumed it was a flight without passengers.

I also assume everything was OK, since nothing in the news. Anyway, is it normal for a ferry flight to have a too much fuel, and is it normal to circle a smaller airport? Is that to keep congestion from arlanda?

Someone mentioned that this is sometimes done as pilot training. Also, it has happened before:

http://www.gate81.se/2008/11/25/navigator-pa-besok/

It would explain a lot.

Touch & Go, also known as Base Training. Final stage of Type Rating training.