Microsoft sells malware from their own site

Spyware Sucks blog reports that The malware commonly known as Winfixer aka Errorsafe is being distributed via MSN Messenger banner advertisements.

APC Magazine also has coverage: Microsoft apologises for serving malware.

And more from SlashDot.

So. Just general incompetence on Microsoft's part, or a greedy salesperson who knew it was malware but doesn't care where their commissions come from?