Out of curiosity, how many different books, etc. gave similar explanations of the symbolism?

The Heisenberg Uncertainty Principle deals with the relationship of how much we can know about a particle's position and its velocity simultaneously. Specifically, the more we know about a particle's velocity, the less we can know about its position, and the more we know about its position, the less we can know about its velocity. Thus, there is always some amount of uncertainty, the minimum amount of which can be easily modeled mathematically.

I fail to see how the Uncertainty Principle could relate to dreams.

maybe a bit of topic, but what about wet dreams? :D
Do they work the same way?

Like this. When you interact with a dream you subtract from its meaning. You can't try to assign a meaning to a dream without affecting its content. This means that the only true dream is the one that has no causality.

*sigh* ....im sure there better forums for that :D

I just google searched a bunch of web sites. Didn't feel like actually buying a book

Which has absolutely nothing to do with Heisenberg's Uncertainty Principle.