I agree. And who can forget the dreaded decimal point screw up? Especially when there is a substantial gap and low volume. I have only seen it once, and it was a shocker. (Havent been caught out by that one, as the broker's website software I was trading through declined the order, thank goodness. Not sure what would happen if using online automated trading).
Also I am going to clean out my keyboard, as several times I have gone to change a number in an order and the backspace button doesn't function. There is probably a bit of food under there.