I tried to add the playlist you mentioned, and QSpot does indeed crash after that. So the problem can be reproduced. The problem seems to be when one of the track that is part of the playlist is loaded, and the artist associated with that particular track cannot be loaded of some reason (same as with the search problem mentioned in a post above). This requires a fix to both the underlying openspotify library and to QSpot. The interesting thing is that this particular (problematic) track is not shown by the official Spotify desktop client at all.