madworld, which firmware is in the box you are using, that would be helpful. Generally I got about the same results as you, mine had firmware dated April23, I believe. I backed it up, and loaded the file on the website, May20 dated. I noticed the scanning slowed down a bit with that firmware, but the sound problem was still there for me. I was using the spdif jack to run my home theater amp for sound, but it would cut off the sound after about 30min. Going to hook it back up tonight and see if that setting for LL or whatever makes any difference on the audio problem, think I already had tried it but didn't note it anyplace.
HW VER 30270303,3
SW VER r2188-19194107 -xs0
DATE : Apr 9 2013, 11:10:32
Des : IX2476_S2