first post avatar fullsize and the rest scaled down.

[Lynne]

In the postbit_legacy, try adding this code here:

<vb:if condition="$show['avatar']">
			<a class="postuseravatar" href="{vb:link member, {vb:raw post}}" title="{vb:rawphrase {vb:raw post['onlinestatusphrase']}, {vb:raw post.username}}">
				<img <vb:if condition="$post[postcount] == 1">style="width:150%"</vb:if> src="{vb:raw post.avatarurl}" alt="{vb:rawphrase xs_avatar, {vb:raw post.username}}" title="{vb:rawphrase xs_avatar, {vb:raw post.username}}" />