I'm having the same problem. I log in to my blog, but I can't get into the stats.
First it told me I had to re-set my browser to accept cookies, which I did. (Although I had changed nothing.)
Now it keeps telling me I have the wrong password. I've re-set my password three times (through profile), to no avail.
When I ask it to send a new password to my email, it sends a different user name with it, then informs me that's not my blog! When I ask it to send a new password to my username, I don't get the email. I can still log into my blog just fine, but obviously the password is now different for the blog stats. Can someone else try to get in and is re-set things? How can I have a password that works on the blog but not on the blog stats? Help!