Thats wrong. This section is found in templates/tmpl_uni/scripts/functions.php
function HelloMemberSection()
<div class="topMemberBlock">
<?= get_member_icon( $memberID, 'right' ) ?>
<div class="hello_member"><?= _t( '_Hello member', getNickName( $memberID ) ) ?></div>
<div class="hello_actions">
<span><a href="<?= $site['url'] ?>member.php"><?= _t('_My account') ?></a></span>
<span><a href="<?= $site['url'] ?>mail.php?mode=inbox"><?= _t('_My Mail') ?></a><?=' '.$sNewLet;?></span>
<span><a href="<? echo getProfileLink( $memberID ) ?>"><?= _t('_My Profile') ?></a></span>
<span><a href="javascript:void(0);"
onclick="window.open( '<?= $site['url'] ?>presence_pop.php' , 'Presence', 'width=260,height=600,toolbar=0,directories=0,menubar=0,status=0,location=0,scrollbars=0,resizable=1');"
><?= _t('_RayPresence') ?></a></span>
<span><a href="<?= $site['url'] ?>logout.php?action=member_logout"><?= _t('_Log Out2')?></a></span>
</div>
The first bolded part is the image, note that in general.css the class is topMemberBlock