IMDB information on OoTP

[Shannon]

Did anyone else notice that under screenplay that Kloves is not listed 
as writing this one, but Michael Goldenberg was given the screenplay 
credit.  

Does anyone know why Kloves is not involved and what this could mean 
for the movie.  

Being that this book was the largest and there is so much information 
going on that I cannot fathom that the movie could be any shorter than 
3 hours without completely ruining the integrity of the novel, I am 
just surprised Kloves is not involved.