I just discovered an issue when trying to register a new site. I go all the way through the registration process, activate account and try to enter username and password but it is always saying incorrect. I looked in the wp_users table and for some reason the user_pass field is blank. This just started happening and I can't think of anything new that would have affected this. I was using register plus redux where the user could enter their own password and thought this might be the problem so I disabled it and tried the regular wordpress registration where it creates one for you. I still get the email to activate and what the username and password is but I still have the same issue and the field in the table is still blank. Not sure why this is happening. Has anyone else dealt with this and if so, how did you fix it?