Continuity mistake: When Maggie arrives at the house, one of Sister Woman's kids throws icecream at her legs. She scrapes it off and smears it into the girl's face, but that amount is about three times as much as she scraped from her leg. (00:04:40)
Audio problem: When Maggie and Big Daddy arrive at the estate from the airport and leave the car, she says "Brick loves you. He does." This sentence is cut in two shots from two angles, and in the second her mouth isn't moving. (00:17:30)
Continuity mistake: When Big Mama talks to Maggie in the bedroom about her marriage Maggie's bag is lying straight in the middle of the bed. At the end of the scene the bag is lying diagonally. (00:24:40)
Continuity mistake: After Maggie (Liz Taylor) goes outside to confront Brick at the car during a raging rainstorm getting thoroughly soaked, she appears a short time later in the drawing room in the same dress, immaculate hairstyle and makeup, looking like she hadn't seen a single drop of water. (01:11:00)
Plot hole: How Brick is still standing (all be it on one leg!) during what appears to be a 12 hour period, after consuming the best part of two bottles of bourbon, coming through a personal crisis and self awareness, followed by instant maturation, then ending the night between the sheets with his wife is truly amazing in the least.