Continuity mistake: Throughout the movie, whether Aladdin is in Street Rat clothing or in Prince Ali attire, he wears the same exact waistband. It has two distinct styles that constantly change throughout the movie, with either outfit. One style is flat on the bottom; the other has a dramatic point downward in the front. The detail lines across it change constantly as well in many scenes.
Continuity mistake: When Jafar first enters his secret lair, he pulls a cord from a lantern suspended to the left of the secret sliding wall door. The next shot comes from the other side of the secret door as it slides open to reveal Jafar and Iago before they enter. The door slides open in the opposite direction for the remainder of the film. Notably when Iago gets stuck in it.
Continuity mistake: During the Prince Ali parade, Aladdin shakes the hands of some men in a towering pile that Genie has scooped up with a human wheelbarrow. The top five of those men pile onto Aladdin. Then the number of faces grows in the pile, first to six, then seven, then eight faces. When Aladdin lifts the pile, there are six men in it.
Continuity mistake: Throughout the movie, whenever Aladdin is dressed as the "Street Rat", he wears pants that are very baggy with a crotch below the knees. When Aladdin is prisoner in the dungeon, seated and shackled to the wall, his pants are like modern sweatpants with full legs and a regular crotch. They conveniently become more pants-like when necessary for running, jumping, Etc.
Continuity mistake: When Aladdin enters his rooftop hideaway, the curtain over the window is supported by a peg on each side. The curtain sags down it the middle to show this fact. When Aladdin opens it later, it slides over as though it were on a curtain rod. Also of note, our first look at the curtain shows it going all the way to the floor. When he tucks Abu in, then turns to open it, the curtain is now above the rim of the wall and less torn. When he slides the curtain open, Aladdin is by Abu on the right of the window, he never takes any steps, but once the curtain is open, Aladdin is on the far left of the window 12 feet away and sits down.
Continuity mistake: Each time the palace is shown in a long shot, it has a straight, wide road leading up to the palace gates. After Jafar has been turned into a genie trapped in the black lamp, and the spells are broken, everything is restored to it's original splendor. However, when the palace is shown to be restored, it no longer has a road leading up to it. The area is packed with houses. Was it put back in the wrong spot?
Continuity mistake: During the song line "These guys don't appreciate I'm broke", the barrel moves closer to the box than earlier.