The latest 3.9 detects these files as Heur.Packed.Unknown. 3.8 is not(I think I reported these FP’s when 3.8 was released, but the latest DB 1163 brings them back)
http://www.virustotal.com/pl/analisis/aa7f3d4ca4ee2304e01562a0bbb9e607
http://www.virustotal.com/pl/analisis/741fda2f100a128233c7875351ea5e31
http://www.virustotal.com/pl/reanalisis.html?d04074f8eda4658aff42626b070a435c