Table text does not show up in pdf

I've got two tables in my FM book, one with 3 columns, the other with 2 columns, both with alternating shading. In FM, the tables both have text in the cells of the right-most column. When I save the book as a pdf, the text in those columns disappears. Oddly, when I select where the text should be in the pdf, Acrobat reader does recognize something there.

I've tried resizing the columns, with no luck. The cell formatting is the same as in other tables in the book, and other tables also have banded shading but don't lose the text when saving as pdf.

Any ideas?