I can only guess why Microsoft keeps sending out the MSN bot as Googlebot [ apparently Mediapartners-Google is the Adsense bot ]..

This has being going on for a while. This is from today.

403 User-Agent claimed to be Googlebot- claim appears to be false.
Agent: Mediapartners-Google
207.46.204.103 msnbot-207-46-204-103.search.msn.com

403 User-Agent claimed to be Googlebot- claim appears to be false.
Agent: Mediapartners-Google
207.46.204.53 msnbot-207-46-204-53.search.msn.com

403 User-Agent claimed to be Googlebot- claim appears to be false.
Agent: Mediapartners-Google
207.46.204.96 msnbot-207-46-204-96.search.msn.com

403 User-Agent claimed to be Googlebot- claim appears to be false.
Agent: Mediapartners-Google
207.46.204.103 msnbot-207-46-204-103.search.msn.com
I'll keep blocking that confused Msnbot until those guys at Microsoft who are running it remember who they work for..

I can only guess at the reasons behind it..

Maybe because Microsoft just doesn't have the same access to sites that people extend to the googlebot, they are jealous of that, so someone decided to switch over the MSNbot useragent to something more successful. eg: googlebot.

This would be a perfect example of that old saying, "if you can't beat them, join them".

Possibly Microsoft has been hacked into again and their Msnbot has been hijacked, now being run by hackers to collect data..

Is it some advertising deal with Google or just a useragent ripoff. ?

Can anyone think of other reasons why Microsoft would need or want to do this with the poor old msnbot ?