Strangely, none of Bootstrap3 glyphicons are displaying in Chrome v31(displays a small square). But, works fine in FF v26, Opera v18, Safari v5.1 and IE v10. Also, works fine in
Note to readers: be sure to read @user2261073's comment and @Jeff's answer concerning a bug in the customizer. It's likely the cause of your problem.
The font file isn't being loaded correctly. Check if the files are in their expected location.
@font-face {
font-family: 'Glyphicons Halflings';
src: url('../fonts/glyphicons-halflings-regular.eot');
src: url('../fonts/glyphicons-halflings-regular.eot?#iefix') format('embedded-opentype'), url('../fonts/glyphicons-halflings-regular.woff') format('woff'), url('../fonts/glyphicons-halflings-regular.ttf') format('truetype'), url('../fonts/glyphicons-halflings-regular.svg#glyphicons-halflingsregular') format('svg');
}
As indicated by Daniel, it might also be a mimetype issue. Chrome's dev tools show downloaded fonts in the network tab: