Lois dishes out the food at the table. When Malcolm speaks to camera, Reece's portion changes shape from mountain shaped to low and wide.
As the boys talk at breakfast, Lois goes from stirring the orange juice to not stirring, depending on the camera angle.
Reese is woken by a dog whining outside the window. As he prepares to leave, we see that Malcolm has a ring (anti-snoring?) on the pinky of his left hand. The ring is missing from his finger the next morning.
When Hal is complaining about when the seminar starts you can see a stage light in the top right hand corner of the screen.