A few hours ago we got alerted about some mysql error
The problem was i dropped the column `activationcode` in users table.
The column was still in use, and all users got their personal activationcode back.
Credits to MM2000 for bug report
Edit:
As posted above i have reworked the "user options" a bit.
I think also new is hiding your subscribed threads, and hiding your online status.
All these checkboxes in "change profile" / "forum settings" should work fine now, except "smileys".