semiologic external-links plugin on localhost

When you are running wordpress on localhost this plugin is not working. The following modification to the code fixes the problem:
Change
if ( preg_match("/\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/", $_SERVER['HTTP_HOST']))

at the beginning of the code to
if ( preg_match("/\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/", $_SERVER['HTTP_HOST']) || !strpos($_SERVER['HTTP_HOST'], '.'))


Hope this helps.

Thanks and Regards
KD