Fix for mobile themes...
Goto Styles & Templates > Stlye Manager.. and in your mobile theme in drop down
Add New Template
Label the template
Then in code box add this code and save... it should all be ok now
Code:
{vb:stylevar htmldoctype}
<html xmlns="http://www.w3.org/1999/xhtml"<vb:if condition="$vboptions['enablefacebookconnect']">
xmlns:fb="http://www.facebook.com/2008/fbml"</vb:if> dir="{vb:stylevar textdirection}" lang="{vb:stylevar languagecode}">
<head>
{vb:cssfile additional.css}
{vb:cssfile register.css}
<title><vb:if condition="$show['coppa']">{vb:rawphrase coppa} </vb:if>{vb:rawphrase register_at_x, {vb:raw
vboptions.bbtitle}}</title>
{vb:raw headinclude_bottom}
{vb:stylevar htmldoctype}
<script type="text/javascript" src="{vb:raw jqueryurl}"></script>
</head>
<body>
<script type="text/javascript">
$(document).ready(function() {
$('#registerform').submit(function() {
$(".error").hide();
var hasError = false;
var emailReg = /^([\w-\.]+@([\w-]+\.)+[\w-]{2,4})?$/;
var emailaddressVal = $("#email").val();
var emailconfirmVal = $("#emailconfirm").val();
if(emailconfirmVal == '') {
$("#emailconfirm").after('<span class="error">{vb:rawphrase you_cant_leave_this_field_empty}</span> ');
hasError = true;
}
if(emailaddressVal == '') {
$("#email").after('<span class="error">{vb:rawphrase you_cant_leave_this_field_empty}</span> ');
hasError = true;
}
if(!emailReg.test(emailaddressVal)) {
$("#email").after('<span class="error">{vb:rawphrase invalid_email_form}</span> ');
hasError = true;
}
if(!emailReg.test(emailconfirmVal )) {
$("#emailconfirm").after('<span class="error">{vb:rawphrase invalid_email_form}</span> ');
hasError = true;
}
if( emailconfirmVal != emailaddressVal ) {
$("#emailconfirm").after('<span class="error">{vb:rawphrase emails_do_not_match}</span> ');
hasError = true;
}
if(hasError == true) { return false; }
});
});
</script>
<html xmlns="http://www.w3.org/1999/xhtml" dir="{vb:stylevar textdirection}" lang="{vb:stylevar languagecode}"
id="vbulletin_html">
<head>
<title>{vb:raw vboptions.bbtitle} - {vb:raw pagetitle}</title>
{vb:raw headinclude}
{vb:raw headinclude_bottom}
</head>
<body>
{vb:raw header}
{vb:raw navbar}
<div id="pagetitle">
<h1>{vb:rawphrase vbulletin_registration}</h1>
<vb:if condition="$vboptions['usecoppa']"><p class="description">{vb:rawphrase step_2_of_2}</p></vb:if>
</div>
<form id="registerform" action="register.php" name="register" method="post">
<vb:if condition="$show['emailerrors']">
<h2 class="blockhead">{vb:rawphrase errors_occurred_during_registration}</h2>
<div class="blockbody">
<ul class="blockrow">
{vb:raw errorlist}
</ul>
</div>
</vb:if>
<h2 class="blockhead">{vb:rawphrase register_at_x, {vb:raw vboptions.bbtitle}}</h2>
<div class="blockbody formcontrols">
<vb:if condition="$show['coppa']">
<div class="blockrow">{vb:rawphrase until_receive_signed_form}</div>
</vb:if>
<h3 class="blocksubhead">{vb:rawphrase email_address}</h3>
<div class="blockrow">
<ul class="group">
<li>
<label for="email">{vb:rawphrase email_address}:</label>
<input type="text" class="textbox" name="email" id="email" maxlength="50" value="{vb:raw email}"
dir="ltr" tabindex="1" />
</li>
<li>
<label for="emailconfirm">{vb:rawphrase confirm_email_address}:</label>
<input type="text" class="textbox" name="emailconfirm" id="emailconfirm" maxlength="50"
value="{vb:raw emailconfirm}" dir="ltr" tabindex="1" />
</li>
</ul>
<br>
<p class="description">{vb:rawphrase reg_ver_confirm_code}</p>
<input type="hidden" id="codehasbeenset" name="codehasbeenset" value="1" />
<vb:if condition="$show['reorder']">
<input type="button" onclick="$('#reorder').val('1'); $('#registerform').submit();" class="button"
value="{vb:rawphrase reorderconfirmationcode}" tabindex="1" accesskey="s" />
<input type="button" onclick="$('#ihaveit').val('1'); $('#registerform').submit
();" class="button" value="{vb:rawphrase ifounditthanks}" tabindex="1" accesskey="s" />
<input type="hidden" id="reorder" name="reorder" value="{vb:raw reorder}" />
<input type="hidden" id="ihaveit" name="ihaveit" value="{vb:raw ihaveit}" />
</vb:if>
<input type="submit" class="button" value="{vb:rawphrase complete_registration}" tabindex="1" accesskey="s"
/>
</div>
</form>
{vb:raw footer}
</body>
</html>