Hi Bruce,
The IE11 on win 2008 server has Enhanced Security Configuration enabled (not restricted mode). I believe this is just higher security levels for internet. I set my web site as a trusted site and dropped the security on trusted sites to the lowest level. But I still have issues with IE11 on the win 2008 server.
I have a web page with form and a browse templates. The form has buttons above the browse that sets a session variable that changes the browses conditional filters. Below the browse are buttons that process the selected record. When the page first appears, all buttons work. When the user press the button to change the filter, the browse response with new list of records. After the new filtered list is displayed, the buttons below the browser no longer operate, and no transmission (gets or posts) are seen at the server when these buttons are pushed. No errors are displayed on IE developers (F12) console. However, all the other buttons work, e.g. browse navigation buttons, the browse filter buttons above the browse. Also selecting records on the browse is sending "Get" transmissions to server. If I refresh the web page, the lower buttons start working again. And the weird part, everything works fine with IE11 running on Win7 computers that we have at the office. I will try to tests with a few virtual Win 2008 server, to see if this issue is just on this server. The virtual servers will need to have IE11 installed first. I do not believe that any of my customers would ever use Win 2008 server OS as clients, so problem is not pressing to me, but I thought you may wish to know what I observed.
Rob