i use to use the <center tags, but dont work with some browsers.
so i tested out <div align="center"> and works a treat.
if you wrap the <div align="center"> </div> around each bit of coding you want centered, then it will work for you to.
first off, are you using post bit legacy ?
if you look at this code and search in post bit legacy and compare with yours. you can see where i have placed the center tags.
for what you want to work.
Code:
<div align="center"><div id="postmenu_$post[postid]">
<if condition="$show['profile']">
<a class="bigusername" href="member.php?$session[sessionurl]u=$post[userid]">$post[musername]</a>
<script type="text/javascript"> vbmenu_register("postmenu_$post[postid]", true); </script>
<else />
$post[musername]
</if></div></div>
<div align="center"><if condition="$post['usertitle']"><div class="smallfont">$post[usertitle]</div></if></div>
<div align="center"><if condition="$post['rank']"><div class="smallfont">$post[rank]</div></if></div>
<div align="center">$template_hook[postbit_userinfo_left]</div>
<div align="center"><if condition="$show['avatar']">
<div class="smallfont">
<br /><a href="member.php?$session[sessionurl]u=$post[userid]"><img src="$post[avatarurl]" $post[avwidth] $post[avheight] alt="<phrase 1="$post[username]">$vbphrase[xs_avatar]</phrase>" border="0" /></a>
</div>
</if></div>