When editing a file, I realized I had made some mistakes, and wanted to go back to a prior version. I tried using "Undo" (Ctrl-Z), and was greeted by a small confirmation dialog, containing the words "Undo Down?" It did not seem to matter whether I answered "Yes" or "Cancel" to this dialog... it went away, but nothing happened to my file, and the undo action did not occur. I could do other things to my file (e.g. add text) and then undo them, but whenever I got back to this point in the "undo stack", I would get back to the "Undo Down?" dialog, and be unable to proceed any farther back. I therefore had to resort to Local History to get my file back to its previous state.

I have no idea what this dialog box was asking me to confirm, by the way.


Issue was resolved