To get 1Password to work with Safari 4 public beta: - Quit Safari - Locate 1Password in your /Applications folder - Ctrl-click > Show Package Contents - Contents > Resources > SupportedBrowsers.plist - Root > Safari > MaxBundleVersion > Change value to 5528.16 - Start Safari (The screencast's a bit old as it was created for the Safari 4 Developer Preview, but you get the idea.) Not