<div class="author_avatar"><img src="{$useravatar['image']}"height="150" width="150"alt="" {$useravatar['width_height']} /></div>
is in the postbit_avatar and I edited it to the above...and I tried changing the 'width_height' at the end and still changes nothing.
EDIT: I found this under postbit_classic (which is what users will see)
And found this: not sure how to remove the post_author_scaleimages without throwing everything else off.
{$ignore_bit}{$deleted_bit}
<a name="pid{$post['pid']}" id="pid{$post['pid']}"></a>
<div class="post classic {$unapproved_shade}" style="{$post_visibility}" id="post_{$post['pid']}">
<div class="post_author scaleimages">
{$post['useravatar']}
<div class="author_information">
<span class="smalltext">
{$post['onlinestatus']} <strong><a href="javascript:;" id="userp">{$post['profilelink']}</a></strong><br />
{$post['usertitle']}<br />
{$post['user_details']}<br /><br /><br />
<div id="fadehover"> {$post['button_email']}{$post['button_pm']}{$post['button_www']}{$post['button_find']}{$post['button_rep']}</div>
</span>