You can edit file templates/jf_krom/css/template.css, comment line:
/*
.vmproduct-slider .product-image:hover .featuredProductImage, .browse-view .row .product .spacer .vm-product-media-container:hover img, .related-products-view .row .product .spacer .vm-product-media-container:hover img {
-moz-transform: rotateY(-180deg);
-webkit-transform: rotateY(-180deg);
transform: rotateY(-180deg);
}
*/
joomfreak