Version: 2.3.0 (using KDE 4.4.2) OS: Linux Installed from: Gentoo Packages Much similar to bug #180477, Amarok copies the wrong file when working with a filtered playlist. To reproduce, filter your playlist and try to drag and drop the second song to a dolphin window (e.g. your mp3 player): the new file on your chosen device/directory will not be the file you selected, but the second song from your unfiltered playlist. Expected behavior would be to have the actually selected song copied.
As far as I can tell, this is a duplicate of 226503 which I fixed for the upcoming 2.3.1 *** This bug has been marked as a duplicate of bug 226503 ***