When Dr.Parrish and Lt. Dunbar are talking with City Engineer Edwards the clock on the wall says 5:50 but when Edwards looks at his watch it reads 3:40.
Although the action is supposed to take place in the Himalayas, the guide, porters, and police official are all speaking Japanese.
Much of the "snow" on the ground and sticking to the expedition's tents is clearly made of wet foam.
At about 25 minutes into the film following the avalanche, the guide Subra is wearing his oxygen mask, but as he walks toward the camera, his mask is clearly not secured, but hanging loosely from his face.
When the expedition are chasing the Yeti into the caves, you see the "rocks" that are falling hit some of the people with no apparent effect.
In the full bodied scenes of the Yeti it is clearly the size of a normal human, but in the close ups of only the arm, the arm is several times thicker than that of a human.
At the beginning of the film, Dr. Parrish says "starting from Los Angeles, California", but seen below the airplane is New York City.