I'm increasingly seeing sites turning to requesting only *some* characters from your password when you login. I guess the logic is that online brute-force attacks can be foiled by a retry limit, and that social/phishing attacks are a bigger vulnerability for a lot of people than actual password compromise. Anyway, this is obviously frustrating because it means I can't get 1Password to autofill passwords for these sites. I don't suppose there is any chance that you guys could have a go at supporting these kinds of forms? I'd be happy to have to turn this feature on manually for a particular URL/domain. Beyond that there seem to be a range of different options.
At the crazy pie-in-the-sky end of the range it would be great if the extension could read the page and see if there were single-character listboxes with labels containing ordinals (1st, 2nd, 3rd etc) and work out that these were asking for characters from the password saved for that site.
At the other extreme, if that sounds a bit too fragile and complicated, then perhaps some sort of user-assisted approach might work? Not sure how to streamline the UI for this, but even at a very crude level, having the option to fill a particular field with a character based on a manually supplied index would be an improvement on having to display the password and count characters by hand!
I'm sure there are other options in between as well.