Over the past week I have noticed a sound issue on my 622. It sounds a little like the sound is coming through a "tin can". There is no degraded video associated with this and it appears on random channels (HD and SD). It also doesn't occur all the time. I thought that perhaps my wife or I accidentally hit a different sound mode on our Kenwood receiver but that is not the case. I have my 622 hooked up through an optical cable to the Kenwood and DVI/HDMI to my Sony RPTV. I have also tried the different DD/PCM settings on the 622 to no avail. I also spoke to my brother who has a 622 and he noticed the same sound issue. Anyone else noticing this or have a fix?