> I regret that one test I will not be attempting is to press and release
> the "volume up" button when the volume is shooting upward to begin with

That's a shame, because that is exactly how you fix the run-away action. I've posted this information several times in the past! Whichever button has stuck, press and release THAT BUTTON again. This sends a new button-up code and cancels the autorepeat.

Although I haven't experienced this bug in months, whenever it happened in the past that action fixed it every time.

Rob