I'm having this problem at http://zen-and-ink.co.uk Want to install dashboard stats - just the basic plug-in for now - and it keeps asking for my wordpress.com log-in but won't accept it. When logging in my username disappears and the log-in screen remains in the stat box.
I have three .com blogs plus the one above. Stats work fine on the .com ones.
Have obtained new password and it still won't work. I have managed to link the new blog to the other ones with my API.
Had a look through the .com forums but the disdain and rudeness to those with the same problem is horrible.