When the doctor needs a blood donor for Little Wolf near the beginning of the film, he states that it will be difficult to find suitable blood because the type is AB-. In fact though the type itself is rare, an AB- recipient can accept blood from any Rh- donor: A-/B-/o- are all ok, and type-specific AB- blood isn't required. Rh- blood is less common than Rh+, but not that rare (particularly o-, the universal donor).
The aforementioned missing left windshield of the catching truck, when in place, is also hinged along the top. Sometimes, from the passenger side of the vehicle you can see the hinge and a visible gap between the windshield and the cab frame. In addition, the windshield cracks partway open at the film's beginning. Racing across the uneven terrain of the Ngorongoro Crater, the catching truck goes hurtling over a ridge, and as it slams down, the left panel windshield comes ajar.
After the rocket has dragged the net over the monkey tree, the tree is cut down. When it falls over it is clear that all the monkeys on its branches are dummies, as they're not moving. Branches that previously were horizontal and had monkeys standing on them upright are becoming vertical, with the monkey dummies still glued into place upright.