Is dream interpretation haram in Islam?

In my very possibly mistaken belief, there is a thin line between religion and superstition that we should not cross. > I want to know whether the activity of dream interpretation is haram according to Quran and sahih al-hadith. There are many ways to do dream interpretation, in particular I'm talking about the type that [this website](http://www.myislamicdream.com/) provides, for example [like this entry about horse](http://www.myislamicdream.com/search.html?txtSearch=horse&cmdSearch=Search) . It cites people's words about the dreams. But people must not make things up, what is their basis to talk about all these dreams? Only what God revealed through Quran and through Muhammad (PBUH) can be a reference, all the rest can only be hearsay, which is a sin. Does that mean such activities should be haram?