I am useing twitter bootstrap 3.2.0 and I use some glyphicons they work properly in ff, chrome, and opera but they are not displayed within the Internet Explorer.
T
Ok, solved the Problem by myself.
The Problem was, that somehow my IE went in a certain security state, in which the font download was disabled.
So I changed the Custom level of the "protected Mode" - you can find that in the Security Tab of the Internet Options Menu.
After you click on the "Custom level..." Button you have to search for "font download" and change it to "enable".
Thanks for your help anyone!