About 2 weeks ago, suddenly unable to log in.
Login window appears, Input user name and password, login screen returns with no error message.
Can log in if I go through the lost password procedure and can log in and out between users with no problems. As soon as the window is closed down and open a new window, I can no longer log in again.
I have reinstalled update of 3.0.4. Removed all plugins. Separately uploaded the wp-login.php file.
Same problem in both Explorer and Firefox.
I have other WordPress blogs which work fine.