I managed to crash my webserver by using a wrong setting in the richest user dashboard box...
You have an option to set how many users should appear in this dashboard box.
I put it on 0, as I do not want hackers to know how much money everyone has.
This resulted in the dashboard box listing all users I have in my database and consuming all the memory => crashed nginx.
If I'm stupid enough to input 0 (thinking I could hide the box that way), others might be doing this mistake as well.
Not a critical bug (minor), but just to have it listed in this thread.