Continuity mistake: James is described on the cast list as a Staff Sergeant, but he wears the rank insignia of a Sergeant First Class.
Continuity mistake: When Pavel picks up the tire from the outhouse, it is a thin tyre with vertical lines, when Bruno is swinging on the tyre a few shots later, it is a thick tyre with lines both vertical and horizontal.
Continuity mistake: When Leonidas says, "The oracle also said our painted-on abs look fake," the fat guy is having abs painted on him, but when the Spartans are skipping, his abs are gone.
Continuity mistake: Shortly before the big cattle drive arc begins, Kipling Flynn pours a teacup full of rum for Lady Ashley to drink. The camera cuts to an over-the-shoulder view as Lady Ashley starts to tip back her teacup; at this point, you can see that the cup is completely empty.
Continuity mistake: Near the end, the tank's turret is seen turning. Camera does a quick cut and it's back to where it was before. Camera cuts and it's turning again.
Continuity mistake: When Michael comes back with a bunch of flowers, Hannah is ironing. One second she's ironing a girdle (I think it is), and the next second she's ironing a bra.
Continuity mistake: In the scene at the 92nd Infantry Division HQ, in the General's office, the General unholsters his pistol and drops it on his desk. In the shot immediately after, his pistol can be seen back in its holster. (00:47:00)