>See the remarks section at http://msdn.microsoft.com/en-us/library/ms228122%28v=vs.100%29.aspx

Thanks, this is a valuable link.

>The following resources may also help, although they primarily relate to IE10:
>http://stackoverflow.com/questions/6983732/ie10-user-agent-causes-asp-net-to-not-send-back-set-cookie-ie10-not-setting-coo
>http://connect.microsoft.com/VisualStudio/feedback/details/662275/asp-net-user-agent-sniffing-and-ie10-internet-explorer-10
>http://support.microsoft.com/kb/2600088
>http://support.microsoft.com/kb/2600217
>http://www.hanselman.com/blog/BugAndFixASPNETFailsToDetectIE10CausingDoPostBackIsUndefinedJavaScriptErrorOrMaintainFF5ScrollbarPosition.aspx

Yes, I see some have come up with various workarounds to adjust non supported option as time goes by, either on a temporary basis or permanent.

This one, however, is very basic. A focus on a field should continue to be supported in all browsers. I would certainly expect Microsoft to adjust IE 11 for that. Have you heard anything that this support was removed? ...or that it would be fixed in an update?