Faulty memory or something else?

Updated below:

It seems there is a serious discrepancy between Ari Fleischer's testimony yesterday in the Scooter Libby trial and reporter John Dickerson's recollection. Ari testified he had told a group of reporters, including Dickerson, that Wilson's wife had sent Wilson to Niger. Dickerson says Ari only dropped hints that the reporters should go find out who sent Wilson. You can see details at the links offered by Josh Marshall below:

Late Update: Then there's the discrepancy which some have noticed between Ari's testimony and that of John Dickerson, which Booman discusses.

Later Update: Here's Dickerson's side of the story.

As I understand it, Scooter's defense team have not included Dickerson on their witness list, which ordinarily means they won't be able to call him. That's a big loss, it seems to me, since Dickerson could both impeach Ari's testimony and simultaneously prove that memories can be faulty -- a key element of Scooter's defense.

Update:

In the comments, anonymous says, "I assume you meant a 'good' loss." I certainly didn't mean to imply that I was rooting for the Libby team, but there's no question in my mind that it's a "big" loss for their team. I'm actually a bit surprised, given the vaunted reputation of the Libby defense team.