What problem are you experiencing specifically?

Some fonts just show up funny because they are anti-aliased by the renderer at runtime. Flash exports the font glyphs into its own memory space and only exports the glyphs it is using, I'm guessing the conversion engine is not perfect hence we get the errors where fonts just down right break to weird illegible blocks.

Try toggling the property setting for animation/readability or play around with the antialias modes ie. custom anti alias in the property dropdown.

You may also try to set TextField.antiAliasType to TextFieldAntiAliasType.ADVANCED if it's a dynamic text-box, there is also a sharpness setting for TextField.fontSharpness (I think... check the documents).

Hope this helps.