I worked it out in the end
I think a coworker changed it for me. I'll randomly fuck with people's computers until I think I've got the culprit.
( Labia Majora You keep on talking but it makes no sense at all, Wed 4 Aug 2010, 11:13, 1 reply, 16 years ago)

I think it's Alt +T that turns it off and on, or Alt+Shift+T

(PsychoChomp, Wed 4 Aug 2010, 11:15, Reply)

Ahhh
I probably accidentally did it (Command + T on an Apple keyboard is a shortcut I use in a program). I'll still fuck with other people's computers though.
( Labia Majora You keep on talking but it makes no sense at all, Wed 4 Aug 2010, 11:16, Reply)

New tab
New tab!
(PenguinOfDeath is Scottish, and most likely angry, Wed 4 Aug 2010, 11:20, Reply)

In Safari and Firefox, yes :p
I use it in something else as well.
( Labia Majora You keep on talking but it makes no sense at all, Wed 4 Aug 2010, 11:21, Reply)

No, I think it's definitely alt + shift + print screen
*sits and waits*
(PenguinOfDeath is Scottish, and most likely angry, Wed 4 Aug 2010, 11:17, Reply)

Reminds me of back in the Quake days
Of convincing noobs that typing "bind mouse1 kill" into the console would make all their weapons a one-shot kill.
( Labia Majora You keep on talking but it makes no sense at all, Wed 4 Aug 2010, 11:20, Reply)

I knew it'd be something stupid, but I thought I'd give it a try anyway
Whoops.
( Agnostic Antichrist Baltimora, Wed 4 Aug 2010, 11:46, Reply)

actually it's ALT+ T+O+T
so if you're typing "total" or something with the alt key pressed that'll cause it.
(PsychoChomp, Wed 4 Aug 2010, 11:17, Reply)