What is the document mode of the page you are visiting? Providing an example URL will help if you are not familiar with IE compatibility modes.
I was unable to reproduce your issue in Internet Explorer 9, 10, or 11.
I created a new HTML page containing an Embedded Timeline list widget.
Passing the page through screenshot tools on IE 11, 10, and 9 on Windows 8.1, 8, and 7 respectively produces the expected results.
http://www.browserstack.com/screenshots/b7745db6e8b41d3add667665bfa319870c6509c0