All DVD-A all problems in 5.1
Emerson Lake and Palmer - Brain Salad Surgery unplayable due to distortion in 5.1
Foreigner - Only with certain speaker configurations such as center channel set to small in 5.1
Portions of Fleetwood Mac Rumours. 99.5% good very small portions of tracks have distortion - Not enough to stop me from listening to disc in 5.1, but it's there.