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Disallow: /forums/index.php?act
Disallow: /forums/index.php?showuser
Disallow: /forums/lofiversion/

User-agent: Googlebot
Disallow: /forums/index.php?act
Disallow: /forums/index.php?showuser
Disallow: /forums/lofiversion/
Disallow: /forums/lofiversion/index.php?