TheMadScientist - 11:33 pm on Dec 16, 2012 (gmt 0)

65.52.108.222 [msnbot-65-52-108-222.search.msn.com]--[Microsoft Internet Explorer]--[Screen Size: 800x600]--[Color Depth: 16 colors] Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2; SLCC1; .NET CLR 1.1.4325; .NET CLR 2.0.40607)

Hack the PHP (or whatever server-side script you're running) to capture the X-Forwarded-For sent by the browser when the JS sends the other info ... I'd guess you'll find it's not MSN Bot at all, but rather the cache or preview and you'll get the real IP of the visitor in the X-Forwarded-For.