I am working with OS 10.9.5, upgraded about a month ago. Some of this may be related to the upgrade. For a while I've been very frustrated with the default font when I open MS Word. The defaults are fonts I never use. And in order to use a different font, I have to select it each time I open the program. I would LOVE to change the default. Recently (perhaps after the system upgrade) documents I open appear with no type visible. I have to select the document and then select the font, which is a royal pain when the document has more than one font and font size. I haven't noted whether certain fonts disappear. Any clues? All speculation, as well as actual solutions, are welcome.