Strange. For the past 2 days, this has been happening: each time I log in at wp-admin page, the login page wiggles and says my password is incorrect. But I know that's the right password. It just won't accept it even when i repeated several times. However, when I clicked "Forgot Password", the screen asks for username or email address to email me a link to reset password. After this click, I didn't bother to open my email to reset password. I simply retype my username and password to log in. This time I log in successfully (without changing my password). This has become a pattern. These past two days, I had to click "forgot password" in order to be able to log in successfully. I remember that problem started after installing the plugin captcha. But I am not sure if it is the cause, or just coincidence. Can someone help?