Cannot read property 'msie' of undefined

After switching to wp-ui.dev.js, I see that the error is coming out of the hashtag change function and the deprecated $.browser call.

Lazy workaround: add

jQuery.browser={};(function(){jQuery.browser.msie=false;
jQuery.browser.version=0;if(navigator.userAgent.match(/MSIE ([0-9]+)\./)){
jQuery.browser.msie=true;jQuery.browser.version=RegExp.$1;}})();

… to the top of wp-ui.js or wp-ui.dev.js.

https://n33.co/2013/03/23/browser-on-jquery-19x-for-legacy-ie-detection

I’m getting this as well. The lazy workaround worked, but I’d prefer a real fix.