StatPress Giving Error

I’m using the StatPress plugin. I keep getting the error:

Warning: gethostbyaddr() [functino.gethostbyaddr]: Address is not in a.b.c.d form in /var/www/flipjarg/blog/wp-content/plugins/wp-statpress/statpress.php on line 978

And here are a few lines from that section (here is the whole file: http://pastebin.ca/1004406 ):

function iriDomain($ip) {
        $host=gethostbyaddr($ip);
    if (ereg('^([0-9]{1,3}\.){3}[0-9]{1,3}$', $host)) {
        return "";
    } else {
return substr(strrchr($host,"."),1);
        }

Does anyone have any ideas as to how I should fix this? Thanks 🙂