Downloading a file using Windows Internet Explorer 10 on Windows RT results in a truncated filename

Consider the following scenario. You are using Windows Internet Explorer 10 on a Windows RT device (such as Microsoft Surface) to download a file from a website. The file's name is long and uses Unicode characters. Additionally, the HTTP request that Internet Explorer 10 sends to the website to download the file includes a Content-Disposition header with an attachment value. In this scenario the filename of the downloaded file may be truncated, beginning with a % character instead of a Unicode character.