To type accented characters on the U.S. English keyboard a "dead key" sequence (e.g., option+u+e=ë) is used.
While 1Password lets you enter a "dead key" accented character when creating or changing a password, good luck entering your accented password when trying to log in. I had to open up the Stickies app, type in my password, copy, and paste it in.
This is cumbersome and it warrants fixing. At least warn the user when creating a password with "dead key" accented characters. If you couldn't copy & paste you'd be locked out of your vault.
Please fix this.