I think this movie must have come out before this incarnation of RM.

But anyway, I just watched it for the first time, and I must say it kinda blew compared to the first two and especially compared to the second. All of the back story was mostly restricted to throwaway references, and they seem to have completely forgotten to put the damn STAG in when we see Harry actually conjure his patronus, despite the fact that we could very clearly see the stag when we watched the scene from the opposite perspective 15 minutes earlier. I mean, how the fuck do you mess that up?