"Jasonr, fair point made. Here in the states, butter is sold in quarter-pound, separately-wrapped "sticks" within each box. Tis a colloquial term. In US measurements, a stick is 1/2 cup."
We have those too, but only Lantantia sells them. All the other brands I have seen either come in 1/2 pound or 1 pound blocks.
"WAIT A MINUTE! I used margarine instead of butter! Do you think THAT did it?"