No matter where I define the ms-rteThemeFontFace-1 style (in order to set the default font face for the Ribbon) it never seems to override what is set in corev4.css
No CSS Registration "after" tags in the master page, no "!important" tags in the custom CSS, nor the controls.css, not even in HtmlEditorStyles.css
Any ideas on how to properly override ms-rteThemeFontFace-1 ?
check this post, maybe help you
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