Desi mouths Fred's line right along with him during the "building of the Bar-B-Q" when he mentions how fat Ethel's fingers have gotten.
The barbecue base moves on rollers when Vivian nudges it after the BBQ was taken apart.
The positions of the bricks in the final Bar-B-Q do not match the positions that Lucy and Ethel placed the bricks when they started to rebuild.
Ricky says Lucy promised to never take off her wedding ring, but Ricky isn't wearing his wedding ring at all.