Add the following to your stylesheet.css file for your template and adjust the color to suit
Code:
#listCell0-1 a:hover {
color: #000000;
}
#listCell0-2 a:hover {
color: #000000;
}
Scrap above - You have this on your stylesheet
Code:
#listCell0-1, #listCell0-2, #listCell0-3, #listCell0-4, .productListing-heading a {
color: #ffffff;
font-size: 1em;
text-align: center;
}
.productListing-heading a:hover {
color: #ffffff;
}
Where you have both the link and the hover as white and that is exactly what is being rendered change the color of the .productListing-heading a:hover entry and you will see it respond