On every PC I use, I keep a folder called \broken. Whenever a Web site blows up on me -- e.g. a transaction fails due to a server glitch -- I keep a screen shot.
In all my years of intensely using Google, I think I've captured maybe only one such failure.
Today, Gmail failed me.
I was trying to pass along an invitation to a friend to join the service, and after a pause, I got back an unpleasant response: