i have a panasonic 42GT25 build date of september 2010. we bought it new for a screamin' deal of $549 around july of 2011. still has VERY low hours on it (there's really nothing on TV. LOL!)
for the first time, i noticed floating blacks while watching red riding hood on blueray. sort of annoying, but 1080p looks fricken AWESOME so i didn't mind it too much.
i can't remember where i got the custom calibration settings (thought it was from plasma buying guide but my settings are a little different. but wherever i got them, they ROCK! heck of a lot better than the out of the box settings, including THX mode.
anyway i set the black level to dark, turned off AGC, CATS is always off and set the gamma from 2.2 to 2.0 - seemed to help alot.
i have most dead formats, including laserdisc, what i find interesting is there are NO floating blacks on LD, VHS, OTA TV, or our laptop via hdmi. in fact on our cheapie sony BDP-BX58 bluray player - DVDs also have NO floating blacks. ONLY blueray...
so, is this perhaps a problem with blueray itself and not the TV?
what is the "USB LED light" fix?
lastly, is there a firmware upgrade for the TV that addresses the floating black issue?