I've noticed a number of sites now are doing something that interferes with the password manager (Lastpass in this case). Common problems are either that autofill doesn't work (even explicitly clicking autofill does nothing), or they put a button in the username/password field that's exactly where Lastpass puts its button, so it's impossible to click.

I don't get it -- don't the sites want users to use more secure passwords? That should mean encourage password managers, unless they imagine I'm gonna remember a 32 character random unique password for every website?