Gooding Morning All (morning in my location anyway :-)
There are many references on this subject here at WW, thought I would add my comment as well.
Of late I have been paying more attention in the area of cloaking. After going over a couple of years of threads on this subject, it appears I would be correct in calling this a cloaked MsnBot? I have seen this IP range many times in the past. I really don't have any site content or images of any value, well perhaps clients email addys. I try my upmost, with my limited understanding to protect my clients privacy, while knowing full well that if personal info is out on the web there are folks out there that know under the right conditions, they can get it.
It would be understandable that it could be a check to see if I am trying to slide something in under radar - I personally check a little deeper on things at times.