My L2410NM made a very annoying buzzing noise at brightness<98, and full brightness is too high for a typically-lit room. There was also the horizontal screendoor effect at the upper right corner.
I've returned it to BestBuy (and barely in time too, since BestBuy's sales rep lied about their...
I have a Q241wb dated December 2007, and the panel is definitely TN, color inversion and all. It also has a strong and angle-dependent pink cast in the midtones, and non-uniform backlighting.
When I ordered this unit the specs on Viewsonic's site said 1:1000 178/178; now they're saying 1:800...