1PasswordMini is completely useless on multiple monitors since Mavericks
When using Mavericks and multiple monitors the 1PasswordMini menu gets displayed partially off the screen. This is especially a problem when using a browser like Chrome which has it's plug-in toolbar buttons on the far right of the window and when the browser is maximised to use the entire available space for that desktop. Clicking the 1Password item on Chrome's toolbar results in the menu being clipped by the screen and unlike previous versions of OS X where it will span across multiple monitors (though still not an ideal solution).
The work-around for the moment is to open the 1PasswordMenu menu via right-clicking on the webpage far away from the right edge of the browser.
What I would have expected is that the menu and sub-menus open contextually but open on the left instead of the right if there is not enough room. This is exactly on OS X system contextual menus work. Try right clicking near the right-hand edge of the screen and the menu will open to the left of the mouse pointer.