Me and the other interns are working away at an intranet site for our host company, and our navigation settings page has stopped working properly.
As soon as the items in the danger zone are selected, the page freezes completely. The only way to recover it is using IE's built in recovery tool.
Background: The last change to the page involved moving the 'Department HR' button down and hiding it.
I managed to gain temporary full control after creating a new heading outside "Current Navigation", long enough to add a heading inside it (for Applications) and placing it between the last two headings in the image. This heading now shows up on the site, but the settings page has reverted to its old state so there's a discrepancy here.