Google has released a Beta of there Web Accelerator yesterday and lucky I did not install this.
This has opened a few security issues with the worst being able to login as another user on websites.
I’d say Google are now embarased at this major hole.
More info here http://news.zdnet.co.uk/internet/security/0,39020375,39197327,00.htm
Update: It looks like it can also break Web Applications
More Info here http://37signals.com/svn/archives2/google_web_accelerator_hey_not_so_fast_an_alert_for_web_app_designers.php