I am getting the same error as well. Can anyone from twitter update us? Is there anyway we can fix this bug at customers end as the error occurs in widgets.js hosted by twitter?
I have a temporary fix in widgets.js
replace line 17 with the following line. It will fix the problem. But you need to host widgets.js file. I am hoping a fix from twitter.
provide("util/datetime",function(a){using("util/util",function(b){function n(a){var e=a||"",h=e.toString(),i,j;return i=function(){var a;if(f.test(h))return parseInt(h,10);if(a=h.match(d))return Date.UTC(a[7],b.indexOf(g,a[1]),a[2],a[3],a[4],a[5]);if(a=h.match(c))return Date.UTC(a[1],a[2]-1,a[3],a[4],a[5],a[6])}(),i?(j=new Date(i),!isNaN(j.getTime())&&j):!1}function o(a,b){function q(a,b){try{return p&&p[a]&&(a=p[a]),a.replace(/%\{([\w_]+)\}/g,function(a,c){return b[c]!==undefined?b[c]:a})}catch(e){}}var c=n(a),d=+(new Date),e=d-c,f,l=b&&b.months||g,o=b&&b.formats||{abbr:"%{number}%{symbol}",shortdate:"%{day} %{month}",longdate:"%{day} %{month} %{year}"},p=b&&b.phrases;return c?isNaN(e)||e<h*2?q("now"):e<i?(f=Math.floor(e/h),q(o.abbr,{number:f,symbol:q(m,{abbr:q("s"),expanded:f>1?q("seconds"):q("second")})})):e<j?(f=Math.floor(e/i),q(o.abbr,{number:f,symbol:q(m,{abbr:q("m"),expanded:f>1?q("minutes"):q("minute")})})):e<k?(f=Math.floor(e/j),q(o.abbr,{number:f,symbol:q(m,{abbr:q("h"),expanded:f>1?q("hours"):q("hour")})})):e<k*365?q(o.shortdate,{day:c.getDate(),month:q(l[c.getMonth()])}):q(o.longtime,{day:c.getDate(),month:q(l[c.getMonth()]),year:c.getFullYear().toString().slice(2)}):""}var c=/(\d{4})-?(\d{2})-?(\d{2})T(\d{2}):?(\d{2}):?(\d{2})(Z|[\+\-]\d{2}:?\d{2})/,d=/[a-z]{3,4} ([a-z]{3}) (\d{1,2}) (\d{1,2}):(\d{2}):(\d{2}) ([\+\-]\d{2}:?\d{2}) (\d{4})/i,e=/[a-z]{3,4}, (\d{1,2}) ([a-z]{3}) (\d{4}) (\d{1,2}):(\d{2}):(\d{2}) ([\+\-]\d{2}:?\d{2})/i,f=/^\d+$/,g=["Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"],h=1e3,i=h*60,j=i*60,k=j*24,l=k*7,m='<abbr title="%{expanded}">%{abbr}</abbr>';a({parse:n,timeAgo:o})})});
