At 38:08, once the ZPM is depleted, there is a shot of the computer screen that shows "ZPM MODULE DEPLETED". Since ZPM is an abbreviation for "Zero Point Module", the screen should have said "ZP MODULE DEPLETED" or "ZPM DEPLETED". However, this duplication
in misuse of abbreviations, while technically incorrect, is commonplace, for example, when people refer to a bank card's 'PIN number' or 'HIV virus'.
When the two McKays meet in the isolation room, the two shots taken in the split screen filming process do not line up properly as the two McKays are not looking at each other.
Seeing as the last time McKay destroyed a whole planet, it appears inconceivable they should conduct this second experiment in Atlantis instead of some uninhabited, expendable world.
Technically, if it's not the system with the Earth and its sun Sol in it, it's called a 'star system', not 'a solar system'. There is only one solar system, which is The Solar System. Of all characters, Carter knows that and would not use the wrong technical terminology.