The goat herd is crossing the road from right to left, when Abandon and John's car first stops to allow it to pass. However, when the car starts moving again, after the herd has supposedly crossed the road, the animals are in the field on the right side of the car again.
The fake Canadian passport that Widmore gives to Locke has a 10-year validity. Canadian passports are valid for five years.
Ben tells Locke that Jack booked a plane ticket from LAX to Sydney for that evening, with a return trip in the morning. This makes no sense because that is a 17 hour flight, minimum. If he left at 7 pm local time, he would arrive in Sydney at 12 pm time at the earliest.
Walt's school is shown to be located on 67th street and 8th Avenue in NYC. However, in reality there is no such street/avenue combination, as since 8th Avenue ends at Columbus Circle (58th and 59th streets) and then it becomes Central Park West.