RE "504 Bad Gateway" error
Consistently on new topic posts. But they do get posted.
Together with 'disconnects'*, often on replies or edits. But, again, they do get posted.
(* Secure Connection Failed — The connection to
www.finetunedmac.com was interrupted while the page was loading.)
Mostly an annoyance.
That said, I had to submit this twice to get it to take, despite 'assurance' that the first attempt was being submitted and therefore that the Submit button was disabled.