Microsoft Antispyware is an unsupported beta product.
Feedback posted here is read by Microsoft, but in general, not responded to
directly.
These groups provide peer to peer feedback.
In general, if you are comparing the results of Microsoft Antispyware to
other products, you need to know that Microsoft Antispyware does not scan
for cookies, nor does it offer selective removal.
So--when comparing, remove detections of cookies or "data miners" (another
name for a type of cookie) from the other lists to make a comparison of
equals.
Microsoft has said that detection of some kinds of cookies may be added to
the beta product at a later stage in the beta.