Single-Keystroke Login
One of the first things people notice about the new Safari extension is that they are seeing a lot more of it. While we would like to think this is a good thing since Dan made it look so darn pretty, we also realize that many of our power users expect to log in and be about their business without extra keystrokes or mouse clicks.
Single-keystroke login is something we are planning on bringing to the Safari extension in a future update, but there is not a time frame at the moment. When the feature arrives it will match the behavior you have come to know and love in the previous Safari extension. That is, if you have only one login saved for a site, you will not be prompted to make a selection when invoking 1Password via the “Fill Login” keyboard shortcut. This is already the case in the Chrome extension which uses almost the same code, but it has not yet been implemented in the Safari 5.1 extension.
For now you still need to select a Login after invoking the 1Password extension regardless of the number of Logins saved for the current site you are viewing.