firefox @font-face wordpress mac = problems

Hi, sorry if this has been covered else where if so can you give me some links?

The problem I have is that the fonts I’m using via @font-face work in chrome and safari and firefox on a PC yet on a mac only chrome and safari work. Firefox does not.

If I use a mac and the @font-face method outside of wordpress, firefox displays what I tell it to without a problem so it appears that WordPress is the culprit here…..but only on firefox on a mac.

Any help much appreciated.

cheers,
George