Can you see the icons with IE10 on http://kudakurage.com/ligature_symbols/ ? Yes? I thought so. I'm happy for you there is nothing wrong with your browser. ;)
There could be a couple of other things wrong. Most of the time it boils down to:
- Font file isn't where you say it is.
- Other CSS problem.
I created a example: http://jsfiddle.net/allcaps/7FL6C/2/ it shows a working example and the fail 'FAIL NO FONT scenario'.
/* FAIL NO FONT scenario */
@font-face {
font-family: 'LigatureSymbols_1';
src: url('there/is/no/font/here/LigatureSymbols-2.11.eot');
src: url('there/is/no/font/here/LigatureSymbols-2.11.eot?#iefix') format('embedded-opentype'),
url('there/is/no/font/here/LigatureSymbols-2.11.woff') format('woff'),
url('there/is/no/font/here/LigatureSymbols-2.11.ttf') format('truetype'),
url('there/is/no/font/here/LigatureSymbols-2.11.svg#LigatureSymbols') format('svg');
src: url('there/is/no/font/here/LigatureSymbols-2.11.ttf') format('truetype');
font-weight: normal;
font-style: normal;
}
In a debugger you get a 404:
The answer to your question is make sure the font loads.