Man, that sucks.
I have no idea but it kinda puts my problem in perspective.
Yesterday I thought I was unplugging my BD Player HDMI cord while the TV was on and set to Cable.
It ended up being the cable so when I plugged it back in my calibrated settings were gone.
Fortunately, most of what happened (I hope) was it switched from Cinema to Vivid. (I only calibrated Cinema)
Switching back fixed the colors.
However, now I'm being bothered by certain shows where they're not as bright as I'm use to.
I remember someone kindly posted here a simple switch in the hidden menu that brightens the TV but damned if I can remember or find it.
I certainly don't want to do any other tweaking.
find out how to access the service again so I'm hoping someone will be kind enough to remind me what that simple adjustment was that brightens the picture.
I'd contact my calibration guy but I'm having trouble finding him too since I can't remember his name.
It sucks getting old.