Hi Simon,
I have checked the page and found the issue you described here. Although it is not affecting the frontend output, still it is very annoying. I have tried a few trials and errors and found that removing the / from (JOIN / LOGIN) from the Secondary text will fix the problem. It seems that the / is not accepted in the Text, and I suspect this could be a bug in the latest version theme. I will report it to the Issue Tracker for further investigation by our development team.
Alternatively, I would suggest you use (JOIN or LOGIN) instead of (JOIN / LOGIN).
Thanks