The text "Cart Subtotal" and "Order Total" is the same color as the background block, and so is invisible.
.post-entry-portfolio-first strong, .entry-content strong {color: #333333;} in minimal-skin.css (line 440) seems to be the offending element.
When I delete the entry in Firebug, it seems to revert to some default colors that are legible in both sides (text and price). Can I safely delete this without affecting some other location?
You can see what I am talking about by adding an item to the cart and then going to the shopping cart - http://cantabilemusic.com
btw, the latest update seems to have solved the "No products found which match your selection" bug.
Create a new thread and tell me what problems you are encountering and what you want to know. 
There is no step 3 :) 
