Continuity Crises

The final eBook of Murder at Magic Lake is due Saturday for Amazon. My proof copy arrived last week, right as work got extra busy. I finally finished reviewing the proof last night. As you can see from the photo below, I have quite a few corrections to make. 

Besides catching typos and tweaking phrases, I also use the final draft to catch continuity errors. For example, did I spell a person's name the same way throughout? Did I change a description or number from one page to the next? These may be small details, but they're noticeable, whether the book is traditionally or independently published. If you're not careful, details can change between book to book, or even in the same paragraph.

When I first started writing, I kept most of my world-building details in my head. These days, I try to be more diligent about writing them down in a separate document. When all else fails, I'll search my story if necessary to make sure my details are consistent.

What's the strangest or funniest continuity error you've noticed in a book, either in your own or in one you've read? Feel free to share in the comments.