Went to see Robert Stickhold's lecture on the role of sleep in the consolidation of memory at the Neuropsychoanalysis Lecture Series. He pretty much debunked Freud's antiquated theory of dreams and left their proponents speechless. It was a no contest debate, although hardly a debate at all.
Stickhold introduced his new SNIP model which proposes that the mind is driven to finish incomplete cogntive processes and that sleep helps facilitate this process. PTSD patients are unable to do this and so are stuck in a memory loop in which trauma is re experienced over and over again. A very fascinating model. Can't wait till it's further validated by future research.