CSS Conflict... help!

In pcStoreFront.css you have this definition:

.pcMainTable {
 width: 100%;
 border: 0;
 border-collapse: collapse;
 color: #FFFFFF;
}
which forces all text in the main table to be white unless otherwise specified. In your h1 tag you are using the wrong tag for the color:

 .pcMainTable h1 {
  background-color: #E5E5E5;
  font-color: #000000;
  font-size: 18px;
  font-weight: bold;
  margin: 0 0 5px 0;
  padding: 5px;
 }
 
It should be color, not font-color, so the black does not take affect for your h1 tag. It inherits from the the pcMainTable color of white.

<<<It should be color, not font-color>>>

color: #000000;

The easiest way to find styles is to view the page in your browser and then choose View Source to see the actual HTML code. Search for the text you want to modify the style for and see what class or id is associated with it. If the text is in the content of the page, then the class is in the pcStoreFront.css file. If it is in the header or footer then it is in the pcHeaderFooter.css file.