Like I said, it's the only prosopagnosia-trait I have - I have no problem remembering the details, I just can't make them come together in my head. It's like one of those join-the-dots drawings, where the dots just don't join up the way they're supposed to. >.<
Recognising people is no problem - they're stored in my memory the way they're supposed to, and I have no problem keeping actors in movies straight, etc. It's just the imagining them when they're not in front of me bit that trips me up.
Brains sure are weird!