I\'ve never seen
The fact that I have never noticed
have also a site where base - tag is used, and the problem described occured. ( after upgrading jquery ), was able to fix it by having tab urls like this:
this makes them "local"
references i used:
http://bugs.jqueryui.com/ticket/7822 http://htmlhelp.com/reference/html40/head/base.html http://tjvantoll.com/2013/02/17/using-jquery-ui-tabs-with-the-base-tag/