This thread has me very worried. I just bought a 42" G10 and I absolutely love it. The picture quality blows away my old Sony direct view HD CRT and my Samsung LN40B610 LCD, and it even looks better than my friends Samsung LED set overall.
However, if this problem is real and the black levels can be expected to rise that drastically I am seriously questioning whether I should keep the set or return it and get something else. The deeper blacks are one of the things I like most about this tv and they are largely the reason for the exceptional picture quality. If shortly the tv is just going to end up looking like an average LCD, then that defeats the whole point and I might as well choose another tv.
I know there is no way to know precisely how many people's sets this has affected, but are there G10 owners out there that haven't had their black levels rise? Maybe somebody could do a poll to give us a rough idea of what percentage of G10s are being affected by this issue.