I have seen this more than ten times using Google Books.
And every time I have been logged into my Google Account which I’ve had for several years and also use for YouTube.
Tonight I got locked out simply paging through search results!
I’ve filled out their damned “I am not a bot” form before and never gotten any response. I’ve still been locked out anywhere from 24 to 48 hours!
And if that form had done any damn good, I never would have seen that message again!
All of you waiting for Google Editions, this is a taste of the disaster to come.