Since today i see this warning and my clients also

Please note that your browser is outdated and may not function correctly with Centova Cast.
Centova Cast requires Internet Explorer 7.0 or greater, or another standards-compliant browser.

This happen in IE 8 and 9 and 10 also google chrome.
Were can i remove this warning everytrhing works fine but it is for our clientes a little confusion

Anyone a idea

Ron