When you have downloaded the 1.2 package before Sunday, 27.7.2008 20:00 you should redownload the package or apply this bug:

www.joomlapolis.com/component/option,com_joomlaboard/Itemid,38/func,view/catid,25/id,69546/#69546

includes.db.php
[code:1]function uddeIMisOnline($myself) {
[...]
$value = $database->loadResult();
return $value;
}
[/code:1]

The "return" line was missing. Without this line users will also get an email notification even when they choose not to get an email when they are online.