Amarok should be GPLv2+ licensed throughout, but not all license headers seem to contain the correct statement. Some files even miss a license header. If there is a incorrect license stated in a header the copyright holders should be contacted before making the fix. It could have been intentional (unlikely). It's useful to know who contributed to various parts of Amarok and during which period for statistical reasons. If we get a complete list and manage to maintain it, any future license changes (ex. to GPLv3) will be easier.

If you are interested in this task, please get in touch with us, Kevin, nick KRF or Edward, nick dr_lepper, in #amarok on irc.freenode.net. We are in the UTC+1 time zone, so be patient if you do not get an immediate answer.