Revealing mistake: The film was rushed to theaters, leaving a few mistakes which Universal fixed. In the original cut, toward the end, Judi Dench's human hand is visible, complete with her wedding ring. This was fixed for the re-release.
Revealing mistake: When Bustopher sings "I'm a 25 pounder" he throws a lettuce leave away and it bounces like a cardboard prop instead of gliding like a real lettuce would do.
Revealing mistake: The first front shot of Skimbleshanks outside on the railroad tracks with the cats behind, the cats don't cast a shadow and seem like they're floating.
Revealing mistake: When the cockroaches dance on the cake they cast no shadow and seem as if they're floating.
Answer: The issue wasn't about her hand looking human but, as you mentioned, that she was wearing her own ring, which was digitally removed in the revised version.
raywest ★