@font-face appears bold and blurred in Firefox on Mac

Hi, I have similar problem but with IE8 on WinXP. I am using Helvetica font converted by http://www.fontsquirrel.com/ and IE8 on WinXP the entire page is rendered in bold (see screenshot https://docs.google.com/open?id=0B9OjAuDRj29pazFENHc3aXBKZEU).…