It works fine on my boards when I use the code manually inserting
PHP Code:
<if condition="THIS_SCRIPT != 'register' AND THIS_SCRIPT != 'login'">
<if condition="$show['guest']">
<!-- guest welcome message -->
<br />
<table class="tborder" cellpadding="$stylevar[cellpadding]" cellspacing="$stylevar[cellspacing]" border="0" width="100%" align="center">
<thead>
<tr>
<td class="alt1" colspan="6">
<phrase 1="faq.php?$session[sessionurl]" 2="register.php?$session[sessionurl]">$vbphrase[first_visit_message]</phrase>
$vbphrase[welcome_ads]
</td>
</tr>
</thead>
</table>
<!-- / guest welcome message -->
<else />
<if condition="is_member_of($bbuserinfo, 3)">
<!-- / unconfirmed user message -->
<br />
<table class="tborder" cellpadding="$stylevar[cellpadding]" cellspacing="$stylevar[cellspacing]" border="0" width="100%" align="center">
<thead>
<tr>
<td class="alt1" colspan="6">
$vbphrase[welcome_unconfirmed]
$vbphrase[welcome_ads]
</td>
</tr>
</thead>
</table>
<!-- / unconfirmed user message -->
<else />
<if condition="$bbuserinfo[posts]<1">
<!-- never posted message -->
<br />
<table class="tborder" cellpadding="$stylevar[cellpadding]" cellspacing="$stylevar[cellspacing]" border="0" width="100%" align="center">
<thead>
<tr>
<td class="alt1" colspan="6">
<phrase 1="$bbuserinfo[username]">$vbphrase[welcome_neverposted]</phrase>
$vbphrase[welcome_ads]
</td>
</tr>
</thead>
</table>
<!-- / never posted message -->
<else />
<if condition="$headerstime - 1209600 > $bbuserinfo[lastpost]">
<!-- never posted message -->
<br />
<table class="tborder" cellpadding="$stylevar[cellpadding]" cellspacing="$stylevar[cellspacing]" border="0" width="100%" align="center">
<thead>
<tr>
<td class="alt1" colspan="6">
<phrase 1="$bbuserinfo[username]">$vbphrase[welcome_postmoreoften]</phrase>
$vbphrase[welcome_ads]
</td>
</tr>
</thead>
</table>
<!-- / never posted message -->
</if>
</if>
</if>
</if>
</if>
into the header template, but using the plugin kills all of my sites.