Nebula upgraded Internet Explorer (IE) from IE9 to the new IE10 64-bit version of Windows on December 23, 2013.
Ariba is not currently compatible with IE10 in the 64-bit environment. We have worked with Nebula to offer a Mozilla Firefox browser that is optimized for Ariba.
Download instructions and more information is available at http://finance.uw.edu/ps/NebulaUpgrade