Different googlebot user agent

[kwngian]

Hi All

I am seeing two different googlebot user agent on my site. Any idea what is the difference between them?

66.249.64.* HTTP/1.0 Googlebot/2.1+(+http://www.google.com/bot.html)
66.249.66.* HTTP/1.1 Mozilla/5.0+(compatible;+Googlebot/2.1;++http://www.google.com/bot.html)

[nancyb]

couple of recent threads about the diff bots for Google:
http://www.webmasterworld.com/forum3/22408.htm [webmasterworld.com]
http://www.webmasterworld.com/forum11/2517.htm [webmasterworld.com]

[markus007]

I'm seeing this lately....

IP = 222.152.115.52
OS = Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1) (+http://www.googlebot.com/bot.html; MSIE 6.0; Wi

Referer =
[us.f121.mail.yahoo.com...]

[g1smd]

Someone followed a link to your site in an e-mail they read in their Yahoo mail, online.

Their browser has spoofed the User-Agent line to sort-of look like GoogleBot.