Database access to mysql failed – OLD_PASSWORD!

Ok. Maybe it’s my current machine config, but i ran the second time into this database connection issue. This time while doing a joomla 1.0.x to 1.5.6 migration  and it always happens, when I am in hurry.

Yep.. it was the old password issue and could be fixed by using:

SET PASSWORD FOR 'username'@'hostname' = OLD_PASSWORD('newpwd');