I've NV50 (bought from 800.com when it was still 129 using 20 off and msn passport 20% off and then ebates, and then sony card triple bonus points, and then some credit back),
it has a bug like a Panasonic once I bought and returned, when switching vcr/tv mode, the screen becomes quite grey, need to change to another channel on tv then change back to ch3 to get back normal color. Do you have such problem?
I've a Sharp too, it doesn't have such problem.