I got the "Your disc is almost full!" message while my iBook was chugging away on something. When I tried to just click the "Yeah, I know..." button I must've moused over the "Don't tell me ever again" check-box because I saw that it was checked as I clicked the "OK" button.
My question: Can I somehow undo that? A preference to delete or something? I WANT to be informed if my disc is almost full.