Other mistake: At lunch, when Sam is using a spoon to shape his mashed potatoes on the tray, his right arm clips through the tray just as he says, "Maybe I should clear out the east wall like this." Then, when Sam says, "Maybe I should fortify the south side first," he's using the spoon to move the mashed potatoes on top of the tray, but his arm and spoon are under the tray, so it looks as if the potatoes move on their own. Additionally, when Sam states that he's so confused, the spoon held up in his right hand appears to vanish in the next shot.
Other mistake: When O'Neill first goes to visit Teal'c in his cell the symbol of Apophis on Teal'c's head is upside down.
Continuity mistake: When Stanley is trying to bounce nuts and bolts off a 790 Unit's butt into a vent like hole in the ground, it shows the robot standing with its feet next to the hole and aligned with it nearly centered perfectly. When it cuts to a different angle from a distance, the robot is now standing a bit to the right. Also the hole appears to change. (00:11:40)