Oh really...I guess she can't be any more specific?
To the best of my knowledge, no one has ever disputed the truth of SBVT.
The FEC is not a trier of fact, except as it relates to Federal Election Law, therefore, any action against the SBVT would have nothing to say about the truth or falsity of their position, a fact she probably knows full well.
The FEC ruling also included MoveOn.org and The League of Conservation Voters, a fact which didn't push the media template of her little hit piece. All parties settled out of court... yawn.
I believe what you meant to say was: "To the best of my knowledge, no one has ever DISPROVED the truth of SBVT." There have been lots of liberals that have insinuated that the charges were false....but stopped short of proving it.
T Boone Pickens offer of a reward comes to mind. I don't think anyone has collected to date.