You know what comes next: When I tried to access localhost/phpmyadmin again, I was locked out with the message: Error In each case, I typed in the same short password and clicked 'Generate Password,' which created three different hashes. I went to the Manage Privileges tab and changed the password for root on localhosts, webdev and 127.0.0.1. I saw the message advising me to change the password of root, which by default has no password. How it all started: I was logged in to phpMyAdmin on my Macbook (which runs Mac OS X v10.7.4). I've deleted the XAMPP folder from my computer and reinstalled it from the DMG file, which of course fixed the problem, but I'd like to know how to fix it in the future. I've read all the posts I could find about this, and none helped.