Fonts change After publishing for Web html5 version

We have a created a interaction that was published for web with both html5 and flash.  the file was placed on Sharepoint 2010.  The font is Arial.  When you view the Flash version the font is correct, but when you view the HTML version the font changes to Times New Roman. It does not matter if you are viewing in IE or Chrome.  

Why would this happen?

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