Strange Greek Fonts in Mac Beta

I'm looking at Black's Learn to Read New Testament Greek. I'm using the latest Mac beta build (let me know if you need the actual version number). My Mac is running Yosemite (10.10) beta 3. 

The Greek fonts in the book are displaying strange (see attached). Is that a bug or something I can correct through the program's setting menu?

Thanks!

Nathan Parker

Visit my blog at http://focusingonthemarkministries.com

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