Hi,
As is known, BitDefender engine does not detect well adware/Riskware. So, also F-Secure :)
Example: http://www.youtube.com/watch?v=yBL-Te1WWg0
I think it would be nice, if you'll improve Adware detection in yours engines (heuristic, cloud...).
I see on many computers of begginers a lot of adware... 
Regards.