Thread:Extension talk:Lingo/DOMDocument error in LingoParser? a bug?

I got a error, [error] "[client 127.0.0.1]PHP Strict Standards: Non-static method DOMDocument::loadHTML should not be called statically, assuming $this from incompatible context in /data/www/html/wiki/extensions/Lingo/LingoParser.php on line 156" my software: Fedora 17 MediaWiki 	1.20.0 PHP 	5.4.8 (apache2handler) MySQL 	5.5.28 - is it a bug?