In the Maxim scene, before Jackie Chan's character discharges his firearm, there's a woman in blue seen smiling. In the following shot after the gun is fired, a man takes her place instead.
When Richard Ng's character is reading a book on how to be invisible, the book title incorrectly spells invisibility as "invisability."
When Cherie Chung's character kicks the henchman in the groin, sending him flying into the drum kit, a wire pulling him back is visible.
After setting fire to the mansion, as Sammo Kam-Bo Hung jumps through the window, he lands on what appears to be a patch of grass but the ripples underneath it prove that must have landed on a crash mat.