Last modified: 2012-09-27 01:10:54 UTC
Via http://en.wikipedia.org/wiki/Wikipedia:Village_pump_%28technical%29#Tabs_moved_to_bottom_of_page_in_Opera - Using Opera 12.0.2, the tabs have been moved to the *bottom* of pages. See http://i.imgur.com/IVrVm.png for a screenshot.
User had incorrect option set in his browser prefs