From Nick Caramello:

--------------

The mailtemplate.inc.php file has code that is
something along these lines:

	if (is_array(Request::getUserVar('to'))) {
		$this->setRecipients($this->processAddresses
($this->getRecipients(),  Request::getUserVar('to'))); 
	}

Which does not work very well since processAddresses takes
Request::getUserVar('to') as a reference, and it chokes (at least on my
version of PHP and OS).  It is easily fixable by changing the code to

	$to = Request::getUserVar('to');
	if (is_array($to)) {
		$this->setRecipients($this->processAddresses
($this->getRecipients(), $to));
	}


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Apparently only certain versions of PHP complain about this.