There is a significant shift in browser usage that you should be aware of.
The chart below from W3Schools.com illustrates the shift well. Internet Explorer is dying. It's not Mozilla Firefox that is loosening Microsoft's once mighty grip on the browser market at the moment, but Chrome from Google.
How does your website look in Chrome? Have you checked? Have you checked your site traffic reports to see how many site visitors are accessing your site via Chrome v. IE? It's going to be more and more vital that your website render in more than Internet Explorer moving forward. Make sure your website is ready for the challenge opportunity.