Unexpected screen when trying to access a thread

Was trying to access this and ended up with this...

Clipboard01.jpg

http://forum.arduino.cc/index.php?topic=174786.msg1297879#msg1297879
http://forum.arduino.cc/index.php?topic=175131.msg1299825#msg1299825

I have spent some time investigating this nginx thing and most the stuff I came across points to it being a tool used by web sites for various reasons like file handling, reverse proxy & load balancing. Could you please tell tell me if the Arduino site(s) use this tool.

Riva:
Could you please tell tell me if the Arduino site(s) use this tool.

Yes.

I have a theory but cannot test it myself.
If you create a new topic and list it in the unread posts (but don't go to it) and then move/delete the topic using a different browser tab/window. Flip back to the unread posts tab/window and then try going to the topic, does it throw up this message?

No. Works fine.

Right.