Hey Drew! Great to hear from you. We should catch up at some point.
For this issue, could you use /delete/*all+*style+*machine_output to refresh your concatenated/compressed CSS file? I think you might have last populated it during a brief window when a css bug was introduced. You could also test this by adding ?debug=style to any card.
If that doesn't work, would you be willing to make it so that *navbox is readable by "Anyone"?
I can't get the navbox working on not signed users I'm afraid :(