While using SO on my iPhone, I often accidentally click the edit button (I know, tiny button, improbable, ridicule me all you want), or when I click it, I often want to change my mind. For me, the back button in mobile safari is my 'undo button', but when I do this, and the page reloads, then the edit button disappears! Reloading the page, starting a new window, clicking the question header all have no effect. Is this a bug, or intentional?
EDIT: This only works with other people's questions, not your own (or my own in my case).