ALERT: Upcoming Salesforce Critical Update will block usage of Fonts included in Themes

I will 2nd the notification system.  As Rich stated, you visit the community less as you gain experience with Skuid.  I only noticed this because I checked the community to see what was new.  Can you also let me know if this will affect my custom CSS files? I did not recognize the above font syntax.  Our CSS is within a static resource and all pages reference it. 

Thank you.