A WebmasterWorld thread has an advertiser complaining that Google's AdWords spider appears to be lowercasing the destination URLs they have. The thing is, the lowercase URLs for this webmaster don't work with the site and they don't have the time right now to implement 301 redirects for each URL.
jdMorgan, WebmasterWorld's AdWords moderator, asked:
Are you sure that's AdwordsBot, and not a scraper crawling through a Google proxy?
I've seen abuse from those "ff-in-fNN.google.com" hosts, and my impression is that they're not addresses used internally by Google. No, I'm not sure, but googlebots normally identify themselves as such, and not as browsers.
The advertiser seems convinced that it is AdWords and not a rogue spider.
The thread is actually turning out to be pretty good with some great details and deeper insight into AdWords crawling behaviors.
Forum discussion at WebmasterWorld.