Hi Im using Arch Linux 64 with Kdemod 3.5.10 (whats weird is that it says im using kde 4.2.2 in the about amarok page) and Ive noticed that about half the time when amarok 2.02  has been open for awhile that sometimes when I add new songs to a playist they wont display in the right hand playlist pane but apparently they are queued up because if I hit play it goes through the queue. If I close and then re-open amarok it seems to fix the problem for a little while.