There is a company called Websense, comes from 208.nnn.nnn.nnn ranges.
They fake UA, big time. Every corporate proxy that is using Websence to spy the their network users has this issue, spreading the fake UAs like crazy.
There is a company called Google, they have Preview option that has "Chrome" in UA.
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.1 (KHTML, like Gecko; Google Web Preview) Chrome/12.0.742 Safari/535.1
The numbers are simply not true.
Nice PR Stunt. Link Bait.