It appears that park effects are broken in V6. (See
this thread for relevant details.)
EDIT: Sorry, that thread I linked has relevant details in the first few posts, and then it quickly degenerates into a pissing match between angry/unhappy people. I'm just talking about the first few posts.
I just figured I'd point that out here so the testers know that this is somethat that's been an issue in the past and needs to be checked for V2006. Thanks.