I've been in contact with product planners and support engineers at LG's US headquarters and their service division.
*I am not an LG employee. We are a dealer and authorized service center. What I am telling everyone here is not to be considered official LG information*
They are aware of the HDMI issue, especially with the Denon receivers (has anyone tested any other brand of receiver?)
They are working on a software fix and will have firmware available to be installed by a service tech. Historically LG has not made firmware available to the general public (only to ASC's.)
I will keep everyone here up to date so long as everyone behaves and refrains from whining about HDMI audio not working and calling LG crap. Last time I checked first gen cutting edge products such as this one have problems. If you don't want to be on the cutting edge don't join the club, and please don't whine when it doesn't work!
ISF, HAA, SBCA, CEDIA Certified