I have lost the left column of my webmail display since I installed Windows 8.1.
Step one - REMOVE windows 8 & install Windows 7 ---JUST kidding
For the site to display correctly you need to run your browser in compatibility mode (I assume you are using Internet explorer)
Here are the details http://www.windows8core.com/how-to-view-and-configure-compatibility-settings-in-internet-explorer-11-of-windows-8-1/
Thanks,
Your solution worked great!
Weaver