This is common when accessing sites in from .HK I find.
The message just asks me if I would like to install the characters but when I say no, then your site seems to load fine.
Not sure if that helps.
theme.html
<table border="0" cellpadding="0" cellspacing="0">
<tr>
<!-- BLOCK START -->
<{foreach item=block from=$xoops_lblocks}>
<{include file="mytheme/theme_blockleft.html"}>
<{/foreach}>
<!-- BLOCK END -->
</tr>
</table>
mytheme/theme_blockleft.html
<td>
<{$block.content}>
</td>
/module/mymod/admin/test.php
<?PHP
include('admin_header.php');
include(XOOPS_ROOT_PATH.'/class/smarty/Smarty.class.php');
// create object
$smarty = new Smarty;
// assign some content.
$smarty->assign('name', 'george smith');
$smarty->assign('address', '45th & Harris');
// display it
xoops_cp_header();
$smarty->display('test.tpl');
xoops_cp_footer();
?>
test.tpl
<{$name}>
<{$address}>
$sql = "DELETE FROM ".$xoopsDB->prefix('mytable')." WHERE recordid = ".$_GET['id'];
$result = $xoopsDB->query($sql);