Instead of using the 75 characters for root password why dont you creat a new mysql user that can accecess the database. With the new phpmyadmin it is very simple. This also prevents anybody from easly stealing your root password from config.php.
This was one of the nice changes 2.2.0
added. From the main page > Users > Add a new User. Very easy to use.
Link to mySQL online documentation included

Hope this helps
ps:
I am clueless about mysql, but thanks to Darrell May and Dan Brown I had no problems doing this.