Yes, but if Libby had heard about Plame from Woodward, his testimony and statements in 26 and 32 are true. Cooper asks Libby about Plame (does not tell him), Libby says he's heard it from reporters. Libby tells investigators and the GJ about this conversation and says he told Cooper that he did not know if it is true. He lied to Cooper about that, which is the right thing to do because he cannot speak to Cooper regarding classified sources, but he did not lie to investigators or the GJ. Libby told them the truth about his conversation with Cooper.
The relevant parts of the indictment have been reproduced for the lurkers, with a link so they can check whether or not I have misrepresented the indictment.
... if Libby had heard about Plame from Woodward, his testimony and statements in 26 and 32 are true.
32.b contains what the prosecutor says is a MATERIALLY FALSE statement by Libby, to wit ...
b. LIBBY advised Matthew Cooper of Time magazine on or about July 12, 2003, that he had heard that other reporters were saying that Wilson's wife worked for the CIA, and further advised him that LIBBY did not know whether this assertion was true;
Having heard anything from Woodward, at any time, would not change the nature of that assertion by the prosecutor, in fact, it would bolster it, as Libby is saying he heard from other reporters.