I am getting this error consistently while logged in on a question page.
Object doesn't support this property or method
qa_042311.js, line 21 character 317
(Press F12 to open developer tools in IE8, if you don't have it, you can get it here: http://www.microsoft.com/downloads/en/details.aspx?FamilyID=95e06cbe-4940-4218-b75d-b8856fced535)
Another surprise by IE. It does not support Date.now()
I'll change it to Date.getTime() it should work in IE then.
I'll include it in the next update.