Filling in for Ann Parker today.
My very first sale had a big oops in it. I'd moved a scene from the San Diego Convention Center to a police station--but forgot to write the transition paragraph signalling the location change!
Thankfully, the brilliant editor Janet Hutchings at Ellery Queen Mystery Magazine spotted my gaff and we fixed it before publication.
Just goes to show that if your story moves swiftly enough, you can get away with...murder!