Forum home page not loading fully

The What's Going On? / Forum Statistics area at the bottom of the home page isn't loading the details of the users on line etc:

The 'active users' link which forms part of that missing section on the forum homepage still works (albeit very slow to populate at the moment): https://www.progarchives.com/forum/active_users.asp, so I'm thinking that something in the code associated with the registration of the newest forum member has caused the loading of the rest of the page to stall. Maybe the fault will clear itself once somebody else registers an account. 

This is the first time I recall Cyrillic letters in a Progarchives forum username. I had no idea it was even possible, considering the BS with Unicode, we have to deal with when editing or adding new albums to the database.