Hmm, I'm not sure how I've ended up supporting someone elses hack

- but yes, I can see the problem.
In the code I posted, change
PHP Code:
$whousers = $DB_site->query_first('
to
PHP Code:
$newusers = $DB_site->query_first('
and it should work.
The reason is that the line changed in the FORUMHOME template is using the array value, not the subsequently created $newmembers variable;
Code:
<div>$vbphrase[reged_today]: $newusers[count], $vbphrase[threads]: $totalthreads, $vbphrase[posts]: $totalposts, $vbphrase[members]: $numbermembers</div>
This would appear to be an oversight by the hack author.