What version are you running? 1.0 What's the URL of the page containing the problem? http://codereview/r/101/diff/#index_header What steps will reproduce the problem? 1. use post-review to create a code review 2. go to the url that the script prints out at the end 3. click "View Diff" 4. click on a line number so that a comment dialog comes up 5. enter a comment 6. click ok; dismisses the dialog 7. After scrolling to the top of the page, I saw three error messages that all say the same thing: Error: undefined 404 Not Found Please try again later. If this continues to happen, please report it to your administrator. 8. If you reload the page, the comments aren't there. What is the expected output? What do you see instead? Comments get saved. What operating system are you using? What browser? Windows XP Home Edition Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:126.96.36.199) Gecko/2009073022 Firefox/3.0.13 Please provide any additional information below. Error details: Page not found (404) Request Method: POST Request URL: http://codereview/api/json/reviewrequests/101/diff/0/file/930/line/1/comments/ No FileDiff matches the given query. You're seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard 404 page.