Here is how Edge responded to News.com:
I submitted the talk, and later sent a second submission using the same system to then ask to be removed from consideration. As an alumni speaker, I know from experience that the entire Black Hat organization is run extremely well. Why they cannot find me in their system, I cannot speak to.
When this story first came to light, it was The Washington Post who contacted me, asking why the talk had been removed from consideration -- and not I who contacted them. I had not, in fact, discussed the talk with anyone between the time that I rescinded the talk and the time I received the call from The Washington Post, and ... their source (remains unclear).
This morning in a discussion, Krebs confirmed what Edge is saying. And as to whether or not the talk was submitted, that seems to be an unprovable he said/she said situation. My take: It's a misunderstanding. But what I'd really like to know more about is how critical this FileVault vulnerability really is.