As of today (it's never happened before) a spread sheet that I'm been
adding to will now delete leading zeros if they are typed or pasted
into any cell. So if I enter 0067, it turns it into 67. I don't want
this. I've looked at cell formatting, auto formatting, conditional
formatting, and can't find out what's making this happen or how to turn
it off. I even tried Paste Special, and picked Text, which should paste
the text exactly as it is and leave it alone, but it still changes it.

OK, maybe I'll feel stupid when I find the answer, but it's driving me
crazy. So what's the trick?