We were up at Disney this past weekend and I noticed what seem to be small problems with the rides. One of the most noticeable was Splash Mountain, the background music was too loud and it was drowning out the dialogue of the characters. Another was Dinosaurs at AK, it was much darker then I remember you couldn't see most of featured parts of the ride. I.E. the pterodactyl that's over the car didn't see it. You keep hearing dino and "look out" cues but saw nothing. It could of been my eyes didn't have enough time to adjust or maybe they do this to make it less scary.

I wonder how often they are tweaked to ensure ride quality?