davidhutntnx

Ok, I seem to have fixed it by exapnding the additional CSS with:

.rowling-widget-list .post-icon img {
    width: 46px;
    height: 46px;
}

Why though remains a mystery.

This what works for me:

.single-post .post-author {
    display: none;
}

Thank you for marking it as resolved, but can you share the solution?