The price does not display in any of the layouts if there are not optional SKUs. The [mp_product_price] shortcode does not work either for single SKU items. The drop-down to select from multiple SKUs does work and displays prices. If an item without a diplayed price is added to the Cart the price displays properly in the cart. I have tested this with multiple themes including twenty eleven. I have downloaded and re-installed marketpress via FTP. But the results are the same.