I don't know if this issue would occur with other resources or not. I've noticed it with Calvin's Commentaries. I have several bibles open in one pane and a few commentaries open in another. Generally it looks like this:

Notice the NKJV on the left is rendered in Calabri, my default font, but Calvin's Commentary is in Times New Roman (?). If I bring up the preferences and change my default font to something else (this happens in the left pane) I see Calvin change in response. Then I change back to Calibri and so does Calvin, but when I come back to the Bible and finish what I was reading there, and then navigate to another book of the Bible -- Calvin follows because he's linked, but changes back to Times New Roman.
Anybody else? Any idea why this resource insists on being rendered in a font other than my default? Should I post logs? And if so, let me know what you want me to do between opening up L4 and archiving the logs (i.e. what do you want to see in the logs?)
Regards,
Matt