In 3.11.91, when I visit the Create a Box page, click "Select a file," and select an ISO, I am correctly taken to a page that shows me the details (name, memory, disk size) of the system that will be created: "Boxes will create a new box with the following properties."  However, if when visiting the page, I first click on "Import 0 boxes from system broker," then click Back, then click "Select a file," I am instead taken to a page that says "Will import 0 boxes from system broker." Visiting that page once makes it impossible to select a file, unless I Cancel and start the wizard over again.

If I reverse the order by first choosing "Select a file" (and actually selecting an ISO!), then choosing "Import 0 boxes from system broker," I wind up stuck on the "Preparing to create a new box" page (I suspect I think I came from "Select a file"), which stalls forever on the "Analyzing..." step.