On February 2nd, NBC correspondent Pete Williams announced Breaking News during the 5 PM ET edition of Hardball: the Christmas Day Bomber, Umar Abdul Mutallab, was giving fresh, actionable information to the FBI which the United States was in turn "aggressively chasing down."
Less than an hour later, this NewsBuster blogged on the matter, wondering whether by leaking the news, "the Obama administration compromised national security," in an attempt to deflect the criticism it had been receiving for mirandizing Mutallab rather than treating him like the enemy combatant he is.
On today's Fox News Watch, panelist Jim Pinkerton gave a "hats off" to this NewsBuster for being first to raise the issue.

They [the RNC] are calling voters, cold calls, and saying to them, what about William Ayers and the close working relationship he had [with Obama], which is not true by anybody's count . . . It certainly is a mischaracterization of the relationship. -- Andrea Mitchell to Sen. Kit Bond (R-Mo.), MSNBC 10-17-08.