While a form control like
<input> is focused the arrow keys, Page Up, Page Down, Home and End all navigate inside the contents of that control rather than the web page itself. This is very useful, but makes it difficult to navigate web pages by keyboard - After focusing a form control, you'll have to press Tab or Shift-Tab until you get to a URL to be able to navigate with the keyboard again. If there is no URL on the web page (shock, horror) the mouse seems to be the only way out.
So is there a keyboard shortcut to give focus back to the page itself?