Corrected entry: Butterflies and dinosaurs never coexisted. The oldest butterfly fossils date back 48 million years - more than 15 million years after the extinction of the dinosaurs.
Corrected entry: Shortly after returning from the time jump where history was altered, we hear a news report stating that fish are beaching themselves in large numbers. The problem with this is that earlier in the movie we learned that the last animal to be born in the wild was a crocodile, and a virus eliminated all other animals. Fish are different kinds of animals than crocodiles and lions, but they're still animals. There shouldn't be any fish left to be reported about, and the reporter's reaction to the story she is telling doesn't indicate shock that the fish are there at all, so they aren't there as a result of history being altered during the jump.
Corrected entry: The biggest mistake I see is the butterfly death changing anything at all. Isn't the place where the butterfly dies engulfed in volcanic ash anyway, killing everything anyhow? So how can the death of this butterfly affect anything, if in a matter of seconds after its death the whole place is destroyed by the volcanic eruption?
Corrected entry: The waves that bring about changes - consequences of a different evolution - never really alter the human-made structures. The buildings are essentially all there, they are just covered with vegetation. The whole world should be changing along with the rest of the natural world.