AT&T’s iPad security breach may have been plugged, but the questions it’s raised continue to leak out to the tech press/mainstream media and the blogosphere. The story is sticking around because of issues regarding responsibility — not just Apple and AT&T’s liability in the matter; the security researchers who discovered the breach and the technology blog that told the world about it are also the subjects of inquiry. The FBI has confirmed it is investigating this week’s revelation that nearly 115,000 email addresses of early adopters may have been accessible to anyone.