This was received from a customer

Navigate Backward Editing Loss - It's sometimes possible during editing with certain key strokes (IBM laptops like T42 have extra forward and backward buttons on the keyboard next to cursor keys) to cause the browser to navigate backwards from the editing page. This causes loss of the current page contents. Navigating browser forward causes browser refresh, and gets an offer to resume editing, which gets the last draft saved. This saves everything except the most recent changes

• Two changes to Confluence could fix this
  o Disallow backward navigation via a popup "Are you sure?"
  o Don't page refresh on going forward to edit page