R – Sifr browser issues

I would recommend setting the font size within the sifr config file, something similar to this: (make note of the font-size element). This insures that the font size is carried out within the sifr and might help you out. if it doesn't let me know there's one more solution i can think of :)

sIFR.replace({
selector: '.din-20-bold',
src: 'fonts/din.swf',
highsrc: 'fonts/din.swf',
css: {
'.sIFR-root' : { 'text-transform': 'uppercase' , 'color':'#FFFFFF', 'text-align':'right', 'width':'484px', 'font-size':'20px', 'font-weight':'bold'},
},
wmode: 'transparent',
paddingTop: 0
});

Make sure to not replace the <a> directly, but replace its parent element.