Yes, reading what one gives to prosecutors does seem to be a good idea, assuming you are suggesting he did not realize that the smoking gun was in the document he turned over.
Libby told the grand jury he heard about Valerie Wilson for the first time on July 10th from Tim Russert.
He talked to Judy Miller about her on June 23rd. This is not rocket science here. Most perjury cases are muddled, this one seems pretty straight forward.
I am happy Fitzgerald didn't overcharge, and only indicted on what he thought he could prove. He proved this charge pretty well unless he is flat out lying about Libby's testimony. Why some here can't see that is beyond me.
Just because there is a natural instinct to protect "our side" we shouldn't let facts not get in our way. Scooter Libby, though still legally innocent, almost certainly committed perjury. The end.