I too am still having problems with the sound dropping out on some HD channels when running thru the HDMI cable.
It's now been about three years since I had FIOS installed and all I've gotten from Verizon is a set of component cables which circumvents the issue but doesn't fix the problem. I've tried a couple of the fixes that have been posted here along the way but, again, havn't found anything that solves the issue.
I know I'm not the onlyone with this issue. Anyone have a surefire solution?
Thanks, C.