The link in the reservation email did not work because a period was being included in the url. This was fixed by modifying /lang/en_US.lang.php to include a space between the url and the period (as shown). Not sure of the line number but it's near the bottom of the file.
$email['reservation_activity_5'] = "If this is a mistake, please contact the administrator at: %s"
. " or by calling %s.\r\n\r\n<br/><br/>"
. "You can view or modify your reservation information at any time by"
. " logging into %s at:\r\n<br/>"
. "<a href=\"%s\" target=\"_blank\">%s</a> .\r\n\r\n<br/><br/>";
