I am finishing up this short documentary piece which I shot it with my, then new, Panasonic GH2. This example was from the first day's shooting. I would estimate that half of the flickering in this shot was user error on my part, not changing the shutter to account for the lights.
However, upon returning to shoot more, I soon realized that there were around ten lights at the location, that not amount of shutter adjustment would correct. I could lessen the effect to some degree, but not eliminate it. At least not at 24p. To the eye, the problem lights flickered and the flickering reflected off of surfaces.
I have been kind of bummed editing this doc because the subject matter is compelling, but the flickering ruined it for me.
Then yesterday I found FurnaceCore and its DeFlicker plugin. It looks like I went and reshot.
They have a 15 day trial here: http://www.thefoundry.co.uk/products/furnacecore/
PS: Yes I see the banding. I'll reduce it with Caleb Pike's tutorial here:vimeo.com/13717050