This message appears whenever I click on the shop owner's username via shop search, as I try to view their profiles.
This also occurs when clicking the link from cults and sMail.
Same problem here - it's the "userinfo" link (that I've also used on some pet profiles to credit an artist, seeing as I always miss user name changes) that is giving the problem:
http://subeta.net/userinfo.php?user=275424 is the link from my shop, but gives the error 404 Not Found nginx/1.4.4

Thank you for your reports. :)
I've confirmed that this is happening and noted it for the programmers. If there are any updates that do not get posted here, I'll let you know!
I also made a post about this same thing happening from my cult. My post is just a few down from this one. However, no one has replied to it.
http://subeta.net/forums.php/read/790386/Unable-to-load-users-profiles-from-cult-forums
Clicking on a username from a shop or in a cult now correctly directs you to their profile. :)
This same issue has been reported to be happening in the sMail section, so I will leave this thread open until that can be fixed as well.
Thank you very much for the update on this issue :)
Excuse me for pinging you but can I also add that I get this same kind of error when trying to view profiles from the Statistics page? Example being Here at the referal ranks, if you click on 's name it leads to: 404 Not Found nginx/1.4.4
This also happens with the Forum Statistics list. I tried to check the Shop stats but I wouldn't stop getting a "Subeta is Down!" message there despite being able to use other parts of the site simultaneously. So the error may or may not be happening on that page too.