I've been using jQuery UI v1.6rc2 for a while, and wanted to upgrade to 1.6rc6 to see that they haven't made any breaking changes. It seems they have; all of my tabs stop working whenever I switch to rc6.
There seems to be two things wrong. First, the manual advocates using the following:
$('#container').tabs();
However, with rc2 I've always had to do this:
$('#container > ul').tabs();
So when rc6 is in effect, none of these methods work.
Also, Firebug reports the following error when rc6 is installed:
$.Event is not a function.
this.namespace+'-state-disabled').attr("...event[prop]=event.originalEvent[prop];}}
All Javascript/jQuery executed before the call to .tabs() work fine. It breaks in both Firefox and Chrome.