Clash of the Titans

When Medusa creeps up on Ixas from behind and he turns around to face her, there's a string of hair stuck horizontally to his forehead where there wasn't in the previous shot.

When Perseus and the Djinn step over Eusebios's shattered stone corpse, his head is suddenly gone and his torso is in a different position than in the previous shot.

Near the end when Andromeda is rescued and back on the ground, she is wearing the cuffs from when she was bound.

The next scene she is without them.

In the Pegasus' final scene, its horseshoes are visible.

Perseus' gladiator sandals change from opened toed to closed toed sporadically from scene-to-scene.

In the filming locations in the end credits, Dinorwic quarry is credited as being in "Wales, [in] England".

Wales and England are different provinces of the British United Kingdom.

When the witch attacks Eusebios there is a shot from the eye view camera rushing towards him, though the witch holding the eye is not the one who grabs him.

After Medusa's gaze fails to affect the Djinn, her tail can be heard rattling twice even though it remains static.

On Charon's ferry when Io is training Perseus, she ends up lying down on the floor of the boat with coins all around her.

The positions of these coins changes between shots, and some disappear completely.

Perseus and Andromeda awake apparently far, far away from Argos - for no apparent reason as Perseus was bringing the two to the surface directly under the temple - at sea side.

Zeus has an American Bald Eagle which would live nowhere near Greece.

Since this is fantasy, we can assume that the gods can transcend the laws of nature and geography.

Differences from mythological sources (including misuse of the names Titan and Kraken) are exempt from being listed as goofs, as are historical inaccuracies, especially when caused by reliance on Renaissance/Baroque artistic depictions.

While in Medusa's lair, Ixas reminds Eusebios to keep his eyes down and then begins to turn away, but in the very next shot, he's still facing Eusebios and turns away a second time.

When Spyros discovers Perseus as a baby with his dead mother Danae in the casket, Perseus' mother has brown hair.

In a later flashback, Danae is blonde.

Royalty of the time often used hair dye and other cosmetics to distinguish their appearance from the common people.

At the beginning of the film Perseus's mother is brown-haired.

But when Io tells Perseus how he was born, his mother is blonde.