IPB Avatares Maiores

Antes de tudo faça backup do seu tema.

Passo 1:

Vá até o ACP > Customization > Themes e escolha o tema que quer editar

Passo 2:

Procure por postContainer no template

Passo 3: 

Procure por:

<li class='cAuthorPane_photo'>
			{template="userPhoto" app="core" group="global" params="$comment->author(), 'large', $comment->warningRef()"}
</li>

Passo 4: 

Substitua por:

<li class='cAuthorPane_photo'>
			{template="userPhoto2" app="core" group="global" params="$comment->author(), 'variable', $comment->warningRef()"}
		</li>

Passo 5:

Crie um novo HTML Template

Name: UserPhoto2

Variables:

$member, $size='small', $warningRef=NULL, $classes='', $hovercard=TRUE

Location: Add To an existing location

Existing Location: front

Group: Add to an existing group

Existing Group: global

Passo 6:

Encontre HTML template "UserPhoto2" e cole o seguinte código nele

{{if $member->member_id and \IPS\Member::loggedIn()->canAccessModule( \IPS\Application\Module::get( 'core', 'members' ) )}}
{{$memberURL = ( $warningRef ) ? $member->url()->setQueryString( 'wr', $warningRef ) : $member->url();}}
	<a href="{$memberURL}" {{if $hovercard}}data-ipsHover data-ipsHover-target="{$memberURL->setQueryString( 'do', 'hovercard' )}"{{endif}} class="ipsUserPhoto ipsUserPhoto_{$size}{{if $classes}} {$classes}{{endif}}" title="{lang="view_user_profile" sprintf="$member->name"}">
		<img src='{{if $member->pp_main_photo}}{file="$member->pp_main_photo"}{{else}}{file="$member->photo"}{{endif}}' alt='{$member->name}'>
	</a>
{{else}}
	<span class='ipsUserPhoto ipsUserPhoto_{$size} {{if $classes}}{$classes}{{endif}}'>
		<img src='{file="$member->photo"}' alt='{$member->name}'>
	</span>
{{endif}}

Passo 7:

Na aba do CSS encontre o custom.css e cole o seguinte código no final do mesmo

.ipsUserPhoto_variable img, img.ipsUserPhoto_variable, .ipsUserPhoto_variable:after {
		width: 170px;
		{{if theme.rounded_photos}}
			border-radius: 0px;
		{{endif}}
	}

Salve tudo e atualize a pagina do fórum e vá até um tópico e veja se deu certo