Here are the software notes direct from our friends at Dish Network for the new 622 software (version L3.56)
Dolby digital audio synch. enhancements,
A/V (HDMI) and MPEG4 closed-captioning robustness updates (e.g. drivers)
changes to reduce reports of incorrect error 004 pop-ups,
fix locked events being shown incorrectly in timer history
possible further fixes for infrequent receiver reset conditions
Dolby digital audio synch. enhancements,
A/V (HDMI) and MPEG4 closed-captioning robustness updates (e.g. drivers)
changes to reduce reports of incorrect error 004 pop-ups,
fix locked events being shown incorrectly in timer history
possible further fixes for infrequent receiver reset conditions