Thanks Ron- I did miss it. However, it seems to be pretty strong at times lately. It was happening last night during Craig Ferguson's show around 1am. I've noticed it during Letterman occasionally too. 6.2 never had the issue but now is not an option.
I can't imagine using PLII in a receiver is the cause. This is a setting that simply "spreads" around whatever sound is coming into the receiver. Might make it more noticeable, but the issue would still be there.