there is a example application "depot" in the book, when you login: Ruby on Rails Discussions - Ruby on Rails Discussions the login form shows,then you enter an error user name or bad pass word,there will show an flash notice "Invalid user/password combination" on top of the login form, it's right, but when you type the url:http://localhost/store,something went wrong,the flash note is still showing on top of the category list, anybody can tell me why? thanks