Screenshot of what happens when I press \'delete\': http://twitpic.com/4mljuy
This is what I see in my production.log:
Started POST \"/clients/1\" fo
You probably have a before filter on the application controller or on your controller with basic auth requested.
Or, do you have any gems for authenication?
Update to the latest jquery ujs driver which includes the CSRF token in each request to prevent your session from being reset since the changes in 3.0.4.