if you have 4.2 add this to the bottom of additional.css
Code:
.cms_widget .widget_post_useravatar img, .block .widget_post_useravatar img {
margin-top:2px;
display: block;
height: 36px;
position: absolute;
}
.postbit-lite .avatarlink img {
border: 1px solid #ddd;
width: 60px;
height: 60px;
}
ul.userlist_showavatars img {
border: 1px solid #ddd;
width: 60px;
height: 60px;
}
#memberlist td.profilepic img, #memberlist img.avatar {
width: 40px;
height: 40px;
}
.member_summary .friends_mini .friends_list li img {
width: 48px;
}
.postbit-lite .avatarlink img {
width: 58px;
height: 58px;
}
.activitybit .avatar img {
width: 58px;
height: 58px;
}
Going by this
post