I have a buzzer here myself, and am exchanging it once the company order in another (special order tv here)
It's a directional type buzz that's coming from the center of the screen. As per Lazyboy's post, I can't hear it if I stand at the TV, but once I'm at ear level, and 12 ft away on the couch,
there it is....
I had a technician from the store come to look at it, who said he couldn't hear anything
It could be a hearing thing though, as I'm 31 and he'd be perhaps late 50's.
It's especially prominent on black screens, and in normal viewing it can still be heard. You'd have to crank up the volume more than you'd need to (but not by much) to drown it out.
I experimented with putting blankets behind the tv for a few minutes, to see if it was an acoustic issue, but it doesn't seem to help.
I'm particularly disappointed, as I sent back an E6500 for this exact buzzing. The budget LG I had before this didn't buzz at all.
If I wall mounted a good bit higher, I wouldn't hear it, but I like to look at the screen at eye level, not looking up.
If the next one buzzes, that's me done with Samsung and I'll be getting a VT60 (at least there are ways around the fan noise).
I really don't want to have to do that though, as the picture is bright and beautiful.