Since upgrading to 6.0.3 my Library doesn't show at all in the viewing pane, and when I try to drag files into it to import, they bounce out and iTunes crashes. My iTunes folder is in the right place. When I click on a playlist, album or even the store nothing appears in the pane. This is on my laptop, but I am more concerned with my new iMac as that is where the bulk of my music resides.