Downgrade to FW1.2. Play back an hour no issue. Switch back to FW1.23. Player freeze after 2 songs. Now had to rivert back to 1.2.
Connected via ALO Reference 8 to Mk3B. Headphone out seem ok. Playback via folder view.
Freeze issue at beginning of song via lineout seem to be solved after installing FW1.27 beta. Need more time to see whether it happen again.