Those at fault shall remain nameless (because I signed an NDA)

[prog]

What is pain?

Running out of laptop battery and leaving your power cable at home?

Wrong! Conan, what is pain?

To unwittingly have two HTML elements with the same ID attribute in a single document, to wish to modify one using AJAX-driven JavaScript, to have the other set to not display.

That is pain.

Comments

[prog.livejournal.com]

Ooh, that kinda-sorta happened to me! Except in my case it was a client's monitoring software pounding my mailsever with alerts, each with severely broken mail headers. So the server decided it was a spammer and routed all the messages to /dev/null.

AFAIK, it continues to do so to this day...