[Daniel]

Wasn't able to find that class...

Here's the code from the activitystream_calendar_event template (the other templates forum, blog post, album have the same)

    <vb:if condition="$userinfo['showavatar']">
        <div class="avatar">
            <img src="{vb:raw userinfo.avatarurl}" alt="{vb:rawphrase xs_avatar, {vb:raw userinfo.username}}" />
        </div>
    </vb:if>

--

Also tried to force the change by adding this rule into activitystream.css

.avatar {
width: 174px !imporant;
height: 172px !important;
}

This seemed to make a change in the spacing, but the images themselves, surprisingly remained small. I wonder if it's being reduced by the system somehow.