I installed the newest wp-openid plugin as correctly as possible (3 steps are hard to mess up) but it's still not doing... well, anything.
I log out as administrator, then click login. At the "login or sign in with OpenID" screen, I used separately both openid.aol.com/(screenname) and (user)@yahoo.com, authenticated with those services, and allowed access. I immediately got sent back to the home page of the blog, not signed in at all.
I also tried simply commenting, and putting an OpenID in the "website" field. It didn't work either.
Any ideas?