Hmm, I've noticed a deterioration: the automatic screen tilt feature no longer works.
When I then go into the SensorTest app, it shows the "x","y","z","a" and "b" sensors flailing about as they do, but the "c" sensor is frozen at some seemingly random value. After rebooting, the "c" value is regularly frozen at zero.
I don't know if this may be
caused by installing the "
SensorTest" app, and I've written the Samsung developers to ask what the "c" sensor corresponds to.
The only other sensor-related application I have added in this time period is "
Off the Hook", which is a great idea and seemed to be working perfectly (now, with the possibly-bad sensor, I'm not so sure).