Hi there,
GPP 1.8 introduced some changes – some users didn’t think the tabs looked ‘tabby’ enough and the thumbnails again didn’t work for a lot of sites so gutters were added. Try this CSS to revert it to your 1.7.8 site:
.woocommerce div.product div.images .flex-control-thumbs li {
padding: 0 !important;
}
.woocommerce-page div.product .woocommerce-tabs ul.tabs li.description_tab {
flex: 1;
text-align: center;
}
.woocommerce #content div.product .woocommerce-tabs ul.tabs li {
border: none;
border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}