[PinkMilk]

Option 3:

Admincp > Styles & Templates > Style Manager > Sizes and Dimensions

Change Inner Border Width to "0"

then scroll down to Additional CSS Definitions and add:

.alt1,
.alt1Active,
.alt2,
.alt2Active {
    border-bottom:1px solid #CCC;
}

.thead {
    border-bottom:1px solid #D1D1E1;
}