On his way out the door, Ober's tells Anakin that his trip to find Grievous will probably be just another "wild Bantha chase."
So, aren't colloquialisms like that usually based on fairly well known "elements" of life? Like here on Earth, geese are pretty common. "Penny for your thoughts" will be heard here in the States primarily because we have pennies. For the same reason, you won't hear that saying in, say, Malaysia. I don't know for certain, but it's likely that Jamaicans don't say "wild goose chase" because they don't often get to experience the joy of a goose in their lives.
So given that, just how common are Bantha's anyway? Why would Obers say that? Isn't Tatooine one of those out of the way places that isn't even part of the Republic? And for that matter, the only experience Obers has with the planet is when Qui Gon entered the screenplay and stole his thunder. Obers was left sitting on the ship twiddling his thumbs.
Are Bantha's that common around the Galaxy that they'd actually have a "slang" saying like "wild Bantha chase"? Or is this just going to be written off by Lucas Worshippers as "nitpicking"?