Who was a student of Freud's that parted ways with him over the theory of the unconscious?

Carl Jung. Jung in my opinion was as flawed as Freud.

http://www.jungiantherapy.com/dreamwork.shtml

In fact, I have often wondered if psychoanalyst thinkers have one leg over the line of sanity most of the time. I am quite certain they would see me as living in a fog.
Such is life.

The student of Freud who parted ways with him over the theory of the unconscious is Carl Jung. To find information like this in the future, you can use reliable sources such as books, scholarly articles, or reputable websites. In this case, the source you provided, jungiantherapy.com, mentions Jung's disagreement with Freud over the theory of the unconscious. It's important to critically evaluate information from various sources and consider different perspectives to form a well-rounded understanding.