With 7.2 r2847 Controller firmware and SqueezeCenter Version: 7.2 - 22786, when I navigate from Music Library->Music Folder-> "folder"->Play All I see the error message "Unable to play file type" error message pop up. My files are flac files.

When I do this for awhile (perhaps 10 times), it appears to partially work. The Now Playing screen will display the right track but have status of Stopped on top of the screen.

Works fine when I try it from Music Library->Artist or Genre or other methods.