Natascha has long hair on her 18th birthday; in the next scene she has a bad "bob" haircut; in the following scene, her hair is long again. It's not even 6 months yet, and her hair went from long to short to long.
When Wolfgang makes Natascha go down a small tunnel to change a water filter, there is a small black bucket next to him with a string attached to it; once Natascha reaches the bottom of the tunnel there is no bucket or string, but when she climbs back out the bucket is there hanging from the string, being pulled back up along with her.
(at around 1h 20 mins) Priklopil's arm is around Natascha's back; the next scene his arm is right next to Natascha's arm and both have their backs against the wall.
Kampusch was also given a TV not just a radio for her to keep in her cellar.