Contrast at 100% and CATS turned off?
Contrast is WHITE LEVEL, not picture contrast. Curious as to why anyone would calibrate a TV without first setting all controls in the middle of their range of operation. When C.A.T.S. is turned on, the sensor reads ambient light and the TV adjusts itself for the appropriate level of illumination consistent with the environment within which the TV is being watched. Pretty hard to do that if the WHITE LEVEL is already set to the maximum. I guess Panasonic added C.A.T.S. because it was a totally useless feature and they had a shipment of sensors.
Running Contrast at or close to 100 will enhance any tendency to burn in an image, use a lot more electricity, shorten the lifespan of the circuits, unnecessarily stimulate the phosphors thereby shortening their useful life and causing the TV to "dim" prematurely, if it happens to make it to a decade with some voltage circuits set at the maximum.
Why is contrast set at 100 on Cinema, Custom and Vivid modes? For electronic testing at maximum voltages and because retailers like to display overly bright TV's in their overly bright stores. Why is contrast set at 50 on Standard mode? Because that is where the home user should be and contrast to 50 is the final operation after all inspection is complete and the TV is to get boxed. The packing department checks for that 50 setting before they box the TV. That way they don't ship any duds or any untested TV's.
Do take note that no other setting is at maximum. This one control, set at its limit, will make it past the 1 year warranty, but will result in a pretty rapid turnover of plasma televisions if left that way.