I have also noticed a change on my SA 8300HDC, in my neck of the woods. Most notably in the record DVR screen display. It use to be that the whole channel block would turn "Red" for the time period, over the recording program display. Now, it only has a red dot on the right side, in the slot. If the program is set up in your "series manager", to record every day (For me it's Jeopardy, LOL) it has three overlapping red dots.
I haven't noted any other changes, other than the box has been re-booting itself, a lot more often in the middle of the night.