Couple of problems have appeared recently with IE11 on Windows 8.1 Pro - everything was fine, but I am assuming a recent patch has caused the problem. Problems are not seen on IE11 on Windows 7 Pro or on other browsers. I'm running on auto-update, so should have the latest software versions.
1) Extra white space is inserted before a table. It happens on multiple web sites. Length of the space varies and could make you think the page has failed. It appears to be consistent for a page but I see no pattern between pages.
2) Multi level Menus implemented through CSS with drop downs to the side are suddenly inordinately sensitive when moving into the drop down making the menu almost useless.
Alex