I experience the following problem:
I logged into my WordPress account from a friend's computer some time ago. I wrote an entry and probably forgot to log out again. When she posted a comment, it logically appeared to be made by me.
I then visited her at home, logged her out and changed my password.
Nonetheless, she still is automatically logged in when visiting my site. I already changed my password twice, but it doesnt change the fact that WordPress recognizes her as me. Even when she herself logs out on the comments panel, the same thing happens again the next day.
The password is now quasi-random, so even if she was malicious - which can't be the case, otherwise she wouldn't notify me about this - it's not likely that she could break in.
I don't know a solution and I can't explain this phenomenon. Any help?