I think it's futile to try and backwards engineer and deduct what individual engine/robot does what. Having said that, I do believe that MSN and Yahoo both have a lot of work to do to add a bit of chlorine to their pool. However, I think trying to focus on one particular search engine too can be futile. Your spinning wheels will lose traction and before you know it you're sunk.

My Search Engine Inclusion looks something like this:

Google: 214
HotBot: 0
AllTheWeb: 1,960
AltaVista: 16,600 (Same for Y!)
Lycos: 171
MSN: 11,049
AOL: 214

Once I stopped worrying about Google, or whomever, and simply began building pages to the best of my ability and to W3C standards where possible, I noticed I was getting more done (less fretting) and slowly drwaing more visitors; going from about 50 visitors per day to about 4100 per day in April.

Why the disparity? I don't know. Frankly, I don't give a damn. I build my pages hoping that their quality will prevail in the long run.

Just a hopeful optimist and romantic, I guess ....

Good Luck!

FYI - double check your robots.txt file to be safe, make sure that 1) it is present and 2) that it's not excluding anyone you want indexing ... happy ranking!

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W. R. Mineo