I did miss the point.
If you do a find and replace of: "document.insertForm" with "document.forms" before running the wizard, it will inspect properly.
The problem is that it isn't inspecting properly, so it is just choosing the first field in your form. It appears this is a bug when updating between those versions. I will log it and make sure it is addressed in the next build.
For now you will have to manipulate the form name manually before running the wizard, or make sure to reset all form elements when running the wizard.