Open Gallery.template.php in function MainPageBlock around line 2391
Find
switch($type)
{
case 'recent':
$query = "SELECT p.ID_PICTURE, p.commenttotal, p.totalratings, p.rating, p.filesize, p.views, p.thumbfilename, p.title, p.ID_MEMBER, m.memberName, m.realName, p.date, p.description FROM {$db_prefix}gallery_pic as p, {$db_prefix}members AS m WHERE p.ID_MEMBER = m.ID_MEMBER AND p.approved = 1 ORDER BY p.ID_PICTURE DESC LIMIT 4";
break;
case 'viewed':
$query = "SELECT p.ID_PICTURE, p.commenttotal, p.totalratings, p.rating, p.filesize, p.views, p.thumbfilename, p.title, p.ID_MEMBER, m.memberName, m.realName, p.date, p.description FROM {$db_prefix}gallery_pic as p, {$db_prefix}members AS m WHERE p.ID_MEMBER = m.ID_MEMBER AND p.approved = 1 ORDER BY p.views DESC LIMIT 4";
break;
case 'mostcomments':
$query = "SELECT p.ID_PICTURE, p.commenttotal, p.totalratings, p.rating, p.filesize, p.views, p.thumbfilename, p.title, p.ID_MEMBER, m.memberName, m.realName, p.date, p.description FROM {$db_prefix}gallery_pic as p, {$db_prefix}members AS m WHERE p.ID_MEMBER = m.ID_MEMBER AND p.approved = 1 ORDER BY p.commenttotal DESC LIMIT 4";
break;
case 'toprated':
$query = "SELECT p.ID_PICTURE, p.commenttotal, p.totalratings, p.rating, p.filesize, p.views, p.thumbfilename, p.title, p.ID_MEMBER, m.memberName, m.realName, p.date, p.description FROM {$db_prefix}gallery_pic as p, {$db_prefix}members AS m WHERE p.ID_MEMBER = m.ID_MEMBER AND p.approved = 1 ORDER BY p.rating DESC LIMIT 4";
break;
}
Change to
switch($type)
{
case 'recent':
$query = "SELECT p.ID_PICTURE, p.commenttotal, p.totalratings, p.rating, p.filesize, p.views, p.thumbfilename, p.title, p.ID_MEMBER, m.memberName, m.realName, p.date, p.description FROM {$db_prefix}gallery_pic as p, {$db_prefix}members AS m WHERE p.ID_MEMBER = m.ID_MEMBER AND p.approved = 1 AND p.USER_ID_CAT = 0 ORDER BY p.ID_PICTURE DESC LIMIT 4";
break;
case 'viewed':
$query = "SELECT p.ID_PICTURE, p.commenttotal, p.totalratings, p.rating, p.filesize, p.views, p.thumbfilename, p.title, p.ID_MEMBER, m.memberName, m.realName, p.date, p.description FROM {$db_prefix}gallery_pic as p, {$db_prefix}members AS m WHERE p.ID_MEMBER = m.ID_MEMBER AND p.approved = 1 AND p.USER_ID_CAT = 0 ORDER BY p.views DESC LIMIT 4";
break;
case 'mostcomments':
$query = "SELECT p.ID_PICTURE, p.commenttotal, p.totalratings, p.rating, p.filesize, p.views, p.thumbfilename, p.title, p.ID_MEMBER, m.memberName, m.realName, p.date, p.description FROM {$db_prefix}gallery_pic as p, {$db_prefix}members AS m WHERE p.ID_MEMBER = m.ID_MEMBER AND p.approved = 1 AND p.USER_ID_CAT = 0 ORDER BY p.commenttotal DESC LIMIT 4";
break;
case 'toprated':
$query = "SELECT p.ID_PICTURE, p.commenttotal, p.totalratings, p.rating, p.filesize, p.views, p.thumbfilename, p.title, p.ID_MEMBER, m.memberName, m.realName, p.date, p.description FROM {$db_prefix}gallery_pic as p, {$db_prefix}members AS m WHERE p.ID_MEMBER = m.ID_MEMBER AND p.approved = 1 AND p.USER_ID_CAT = 0 ORDER BY p.rating DESC LIMIT 4";
break;
}