New Card yields a different size?

[Barry Levine]

When I use the menu command "New Card" to add a card to my stack 
(development environment), the resulting card is taller (about 15-20 
pixels) than the first card even though the card properties declare 
both cards to be the same size. The first card of the stack is 620x460 
pixels.

I could use a little advice if someone feels so inclined.

Thanks,
Barry