CSS
.message .messageSidebar .userAvatar > a > img {
-webkit-transition-duration: 0.8s;
-moz-transition-duration: 0.8s;
-o-transition-duration: 0.8s;
transition-duration: 0.8s;
-webkit-transition-property: -webkit-transform;
-moz-transition-property: -moz-transform;
-o-transition-property: -o-transform;
transition-property: transform;
overflow:hidden;
}
.message .messageSidebar .userAvatar > a > img:hover
{
-webkit-transform:scale(2.1);
-moz-transform:scale(2.1);
-o-transform:scale(2.1);
}