To anyone who wants to fix the avatars now, just stick this in your custom CSS box.
@media (min-width: 768px) {
.CommentPost:not(.Post--hidden), .ReplyPlaceholder {min-height: 64px + 40px;}
.PostUser-avatar {
margin-left: 0;
float: none;
left: -85px;
position: absolute
}
.Post-header {position: relative}
.LoadingPost .Post-header {position: relative}
}