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

[radiotelescope.livejournal.com]

...And hear the lamentation of their women's CSS selectors.

[cnoocy]

I did that a few weeks ago!

[radtea.livejournal.com]

Pain is also having an over-zealous minion at a client totally fark your e-mail system by sending you several dozen copies of the same huge file 'cause "it didn't send right" the first time, exceeding disk quotas on the server and mysteriously boning your e-mail client at the same time.

And pain is wondering how many e-mails from other clients bounced while you were either unaware of the problem or trying to get the damned thing fixed.

[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...