When the chariots are riding out of the city, the shots alternate between a clear blue sky and a sky with clouds.
When Nefretiri has Moses brought from the brick works to her barge, he is filthy, and he holds himself back from embracing her. At one point in the conversation, he grabs her shoulders, but leaves no marks on her or on her dress. Later in the conversation, he refrains from holding her again for fear of soiling her dress.
When the Pharaoh's chariots leave the city gates to go after the slaves, some shots of the chariots have long shadows, as if shot in late afternoon. But in other shots of the chariots, their shadows are short, as if shot in mid-day.
The position of Pharoah's arm changes when he calls "Forward!"
As the sheep shearing festival, the wool is sold to Lugar, then Jethro's six daughters dance for Moses and the sheikhs. Moses leaves them to seek out Sephora. While they talk, many unshorn sheep are visible in the background.
On the night of the 10th plague, the shadow of The Destroyer appears over a 3/4-moon. It should be a Full Moon. Passover (as this night is now celebrated) starts on the first Full Moon after the Vernal Equinox.
While Moses dines with the Midianites, Jethro claims that his family is descended from Abraham's son, Ishmael. According to Genesis 25:1-2, the Midianites were descendants of Abraham's concubine, Keturah. The Ishmaelites descended from Hagar, one of Abraham's other wives.
After the tenth plague, Rameses places his son in the arms of a falcon-headed idol and addresses the god as Sokath. In fact, the god was crocodile-headed and called Sobek.
When Dathan asks where they are going, the soldier tells him hopefully to hell. Not only would an Egyptian not know of "hell" but the word did not come into being until 725 AD.
Miriam tells the women at the well to fill their jars, because there will be 7 days without water. Pharaoh's jar of water turns red. The Hebrew women's water did not turn to blood was because God exempted the Hebrews from the plagues.
The Red Sea just parted, the sea floor should be mud or wet sand, yet it is completely dry. This is not a goof; it is a miracle. The book of Exodus, on which the movie is based, says multiple times that the land was dry.
Moses appears to be wearing the same cloak for more than forty years but it never shows any aging at any point in the story. However, this is not a goof but a miracle. The source account in the Bible says in more than one place that the clothing and sandals of the children of Israel were miraculously preserved preserved from wear through the full duration of the wilderness wanderings.
As per the usual policy, differences between the movie and its source material are exempt from being listed as goofs, especially when relating to dramatic decisions. Most historical inaccuracies also get a pass, especially when they're caused by reliance religious and/or artistic traditions.
When the Israelites are making the golden calf, one of the male dancers carelessly, but harmlessly, backs into the pot of molten metal.
When the Hebrews are leaving Egypt, a man throws a golden calf statue to a small boy, who catches it with no problem. If this were made of solid gold, this could be a mistake, but if it were made of wood covered in gold leaf (which was a common method) it would not have been very heavy.
As Moses was completing the building of an Egyptian city, and called for a blue pennant, the guard waves a blue flag in front of the backdrop, and the flag is filtered out and becomes transparent, alluding to the fact that there is in fact a blue-screened backdrop and not an actual city behind them.
The floating basket bounces in the water when the lid is closed. When the lid is open and the baby Moses is visible, the basket is stationary, very obviously supported under the water.
When Moses confronts Rameses just before changing the sea into blood a black object moves around on the ground (probably a button or a part of a costume coming off).
After Rameses sends Moses away with only one day's ration of bread and water, Moses journeys into the desert even after Rameses' chariot has left. Moses would have been better served to go back to the Hebrews of Goshen to get adequate provisions before venturing into the desert. The actual biblical account makes better sense, in which Moses simply flees to Midian, avoiding capture by the Egyptians.
During the Rameses' speech: "Water of Life, give drink to the desert and make green the meadow", a tiny object rolls on the floor, stopping next to Aaron's foot. This is probably a bead from a costume.
When Pharaoh's chariot is riding out of the city to chase down Moses you can see the tire track of the camera truck next to the chariot's track.
No explanation is given as to how Moses grew a beard so quickly when he came down from Mount Sinai.
When Bithia brings Moses out of the Nile, an obvious zipper runs up the back of her dress.
The safety pin on the infant Moses' diaper can be seen when the baby is floating down the Nile.
Debra Paget's high-heeled shoes are visible early in the film, even though her dress was designed to hide them.
When Nefretiri is playing "Hounds and Jackals" and talking with Rameses, the lace trim at the top of her brassiere is visible.
Miriam tells the women at the well to fill their jars, because there will be 7 days without water. But Pharoh had a jar of water, which then turned red, so why would the women's' jars not also be red?
During the end scene, Sephora says to Moses "You are God's torch that lights the way to freedom", but a different voice says "that lights the way to freedom." Yvonne De Carlo turned just as she said that part of the line, so it may have been dubbed.
When Sephora's six sisters dance in the tent in front of Moses and the sheikhs, the background music starts just before the musicians begin playing.
When Moses stands on the rock with the Ten Commandments tablets in his hands, he points to the Hebrews and said "Blasphemers! Idolaters!", but his lips never open.
Near the end of the movie, Moses comes down from the mountain with the tablets to find his people rioting. He tells them anyone on god's side come to him. Then he points his finger at the crowd and says "Blasphemers! Idolators! For this you shall drink bitter waters!" His mouth doesn't move for the first two words.
As Moses approaches the Burning Bush on Mount Sinai, tire tracks from the camera dolly are visible on the ground behind him.
When Moses encounters Joshua in his sheep fields ("Moses, there is a man among the sheep!"), Moses casts three shadows as he approaches Joshua, clearly revealing the positioning of studio lights.
During the end scene, we see multiple shadows for Moses and the rest, indicating multiple lights used for the scene.
Engulfed with water, a wicker basket will partially sink, but it won't plunge completely out of sight. A stagehand is obviously causing baby Moses' basket to be pulled downward from Judith Anderson's hands.
Rameses stands in front of the Saqarra pyramids, with the Nile in the background, and deports Moses into the desert. That would send Moses west into the Sahara, instead of east across the Sinai.
After Rameses tells Moses that the slaves are free to go, the Hebrews line up along a road lined with many identical sphinxes, which the narrator identifies as the "Avenue of the Sphinxes." That road still exists, in the ancient Egyptian capital of Thebes, now known as Luxor. Yet pyramids are visible in the background. Those pyramids are in Giza, which is near Cairo, about 315 miles (500 km) north of Luxor.
When Nefretiri is watching Moses re-enter the city, she's holding a branch with yellow flowers which are unmistakably wattle flowers. This flower is native to Australia and won't be widely known about for another 3000 years.
In the morning of the day of exodus, a man blows horn beside Rameses' statue. Since the set was built facing the south, the sunlight from the left side of the scene means that the scene was filmed before the sunset .
When Yochabel was caught between stone blocks, the tongue on the left-hand stone was obviously too tall and too wide to fit the hole in the right-hand stone.
When Zipporah talks to Moses about her hands being rough, that would not be so. She handles the sheep's fleece daily and the natural lanolin would make her hands very soft.
Just as Rameses is pouring "The Water of Life" into the the fountain pool, there is a little brown mouse-like creature that appears on the floor right behind Aaron. The creature travels an insect-like path toward Aaron, then it remains in place as Aaron walks off (as seen on the Blu-Ray version).