Mac users have occasionally seen an issue where MAPublisher panels will display an unreadable font as shown in the image below.
This occurs when a font manager such as Suitcase Fusion or Font Agent Pro is installed. MAPublisher is unable to locate the default font and chooses another font automatically. In this case, that font is Helvetica Fractions. The solution to this problem is to remove or deactivate Helvetica Fractions from your font collection. For instructions on removing fonts, see the help for your font manager or contact the font management software company for technical support. For more information on this issue see this blog post.