I've now read it. Here's the breakdown, with the charges rearranged into logical groupings.
First, the Russert charges: Libby told the grand jury that Tim Russert asked him, "did you know that Ambassador Wilson's wife works at the CIA?" and that Russert added that "all the reporters knew it." Russert told the grand jury that he and Libby did not discuss Wilson at all. The grand jury believes Russert, and this is the basis for one count of perjury and one count of making a false statement. By itself, not very strong -- it's Libby's word against Russert's.
Second, the Cooper charges. Libby told the grand jury that he said to Matthew Cooper of Time that reporters were telling the administration that that Wilson's wife was CIA, but that he didn't know if that was true. Cooper told the grand jury that he asked about Wilson's wife being CIA, and Libby said "I heard that too," without elaboration. This is the basis of the other perjury charge and the other false statement charge. The grand jury believes Cooper, and once again it's Libby's word against the reporter.