Use the bulletproof @font-face syntax

Rule from css under compatibility category

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Internet Explorer 6, 7 and 8 incorrectly parse URIs to font files contained within @font-face declarations causing the browser to return a 404 error code for the resource.

@font-face {
    font-family: 'BrokenFont';
    src: url('broken-font.eot') format('embedded-opentype');
    /* the URI `broken-font.eot` will not be 
       parsed correctly by Internet Explorer */
}

/* instead, do... */

@font-face {
    font-family: 'WorkingFont';
    src: url('working-font.eot?#iefix') format('embedded-opentype');
}

How do I fix this ?

Simply append a query-string value to the URI. The query-string value will cause Internet Explorer to parse the URI correctly. Be sure to use a query-string value that will remind you of its importance (such as ?#iefix) to avoid accidental removal.

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