Same here, had it since last July, but didn't use 3D all that much.
I have the Disney WOW calibration disc, which has a pixel flipper. If I run that, and then hit the 3D button on the TV remote, to switch the TV into 2D to 3D conversion, then I'm technically running the pixel flipper in 3D mode. I tried that for 10 minutes, but it didn't change anything.
I'm wondering if running it for 24 will be fix it, damage it, or just be a waste of time.