1] I entered a place detail for an existing place.
2] I noticed I spelled the place detail incorrectly.
3] I went back to the entry where I spelled the place detail incorrectly and made a one letter correction.
4] I went to the place list and displayed the place on the screen and noted that I had the correct spelling of the place detail and still had the incorrect spelling of the place detail.
5] Fine. Let's delete the incorrectly spelled place detail.
6] Warning message
"There are events using this place. Are you sure you want to delete it?
7] Result. It deleted all of the place details [both correct and incorrect] plus the original place name itself.
8] This action was recoverable. It was the first entry of the day and I had not made any other changes. I renamed the database and restored yesterday's backup. Went back to the 1910 census and entered the family data all over for the 1910 census.
9] Conclusion. Don't do stupid things like deleting a place detail thinking that it only applies to the place detail field itself.