Once you active the attitude pro theme and just have a look. If that works in IE then you have done something wrong. Just have a try. If there is still porblem in fresh attitude pro the we will update in our upcomming version.
I activated the pro version, also tried it on a different domain. In a other post I’ve read the slider takes more space in IE11. When do you think to have the update ready? I really like this theme and want to use (buy) it more often but then it has to work.