Continuity: In the scene where Macaulay Caulkin has all his friend over and they are riding the rollercoaster there is a section of it missing.
Continuity: When Richard and Regina Rich are in the aeroplane and they unwrap the TNT, it has 9 or 8 seconds on it. So if you count down every time it beeps, the TNT should have exploded at least 3 seconds before they throw it out the window.
Continuity: While being confronted by his teacher for sending fax messages to his friend across the class, Richie removes the fax from the fax machine. Several shots later, the fax has reappeared.