I am trying to use glyphicons as a font within my site and they do not display after a "cache-clearing refresh" (ctrl+F5), or hitting the 'Back' button. If I browse within the site, the icons will display.
Since the site is on a private intranet, I can not link to it here, but I am seeing the same quirkiness on well-known sites such as glyphicons.com and getbootstrap.com/components/#glyphicons.
If it helps, I am using IE11 (11.0.9600.17959) on Windows 7 Enterprise, Service Pack 1