If statement not working latest version

[drako13337]

<if $mybb->user['avatar'] then>
<img title="{$mybb->user['username']}" alt="Pic" src="{$mybb->user['avatar']}" onerror="this.style.display='none'" />
<else>
<img title="{$mybb->user['username']}" alt="Pic" src="{$theme['imgdir']}/default_avatar.png" />
<else>
</if>

Also

<if $thread['closed'] then>

</if>