I noticed in my access logs that a server purporting to be www.google.com.ua (aka 72.14.221.104 aka google ukraine) was fishing around trying to find a file called show_ads.js in a /capcha.files directory at various levels around my site. Not sure what the hell this is about, but I hope that a) google explains what they are trying to do b) it stops soon.
A bit of poking around indicates that show_ads.js is something to do with google adsense ads. Still doesn’t explain why they are trying to put or find the file in relation to some capcha configurations (which I don’t have).