If you have the {pagetreesearch} macro in the default page location in Confluence 3.1 (at the bottom in a column next to the change history macro), when the page loads the autofocus causes the browser to jump to that location on the page. It's easy to fix (either move the macro higher up in the page, or remove it altogether), but it's annoying because it will make its way on to every page we create unless we make a conscious effort to remove it.