upgrade to 5.6.0.1 Looses use login passwords

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After upgrading 4 sites to 5.6.0.1 3 worked.
1 site required the 'tools' upgrade process then it worked for access.
That site has lost validation of the passwords to login. It will not accept the old/current password. I asked for a reset of the webmaster/administrator password. The reset worked. NOW webmaster has lost all update power for users. All it can do is try to delete itself. Good thing it cannot. other logins still do not work and have not been reset. SQL query shows the password is still set correctly. Insight anyone?

Biged2011
 
Biged2011 replied on at Permalink Reply
Biged2011
It is interesting how we learn things because we have to. I just became acquainted with how 'PASSWORD_SALT' is used and important. In the process of trying to find the problem with a failed upgrade, I used another SQL DB to test. Of course it did not solve the problem but it did cause the last problem. The SALT was changed. When I restored the original SALT all worked fine. I suppose everyone knows that but me.