Found it. Went to 64px instead:
PHP Code:
.activity-stream-widget .conversation-list.stream-view .list-item-header .avatar, .channel-content-widget .conversation-list.stream-view .list-item-header .avatar, .activity-stream-widget .post-footer-wrapper .post-footer .divider, .channel-content-widget .post-footer-wrapper .post-footer .divider, .blog-conversation-content-widget .post-footer-wrapper .post-footer .divider, .activity-stream-widget .post-footer-wrapper .post-footer .post-info, .channel-content-widget .post-footer-wrapper .post-footer .post-info, .blog-conversation-content-widget .post-footer-wrapper .post-footer .post-info {
width: 64px;
height: 64px;
}
.avatar > img {
max-height: 64px;
max-width: 64px !important;
}