Hmm, that is interesting. There have been times that I have not seen a movie in years, and then when I rewatch it, certain details are not as I remember them. I'm sure the same can go for dreams. I think that the sooner they are written down, the "closer" they are to what really happened. That's a problem with my dream journal, though. I usually can't remember enough of a dream to form a cohesive whole, so I don't write any of it down.