[Mediawiki-l] Help debugging Warnings

Any idea what would cause and how to fix the following Warnings?

Warning:  file_get_contents() [<a
href='function.file-get-contents'>function.file-get-contents</a>]:
php_network_getaddresses: getaddrinfo failed: Name or service not
known in /var/www/mediawiki-1.14.0/includes/HttpFunctions.php on line
116

Warning:  
file_get_contents(http://meta.wikimedia.org/w/index.php?title=Title_blacklist&amp;action=raw)
[<a href='function.file-get-contents'>function.file-get-contents</a>]:
failed to open stream: Success in
/var/www/mediawiki-1.14.0/includes/HttpFunctions.php on line 116

The warnings are triggered when I Edit a page.

Thanks
Bill

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