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: Kai orders his squadron to bring up their stingers on their bug ships, and in a side angle shows them curling up like a scorpion stinger. It then cuts to a close up of one stinger opening and it suddenly changes shape a little. In the side angle it looking more like a shark head with a visible hump on the bottom side, to being almost a perfect round football like shape in the close up. Also the space gas around the ship changes from green to white between shots. (00:02:35)