Good to have found this thread. I too experience a delay, and it varies in length for some reason. I have an HR-20 hooked up HDMI to the tv and optical to the receiver (no particular reason). Sometimes when I am watching something that I recorded, I will get a huuge delay. Upwards of 1 second. To fix it, I pause the show, turn the receiver off and back on, and the delay although still there, is reduced dramatically. No idea what would cause this or why turning it off and on mostly fixes it, but it does. This dramatic delay only happens when watching something recorded, and even then it isn't every time, but it is frequent enough.
The normal delay is usually minor enough, that if I'm not thinking about it, I don't tend to notice. Once the thought creeps in to my head, then I see it everywhere.
Home Theater Enthusiast