o a mysql import and overwrite the mysql database itself, such as when you might be restoring from a m... up all your mysql users, permissions, etc -- but it can wreak havoc with things like the debian-sys-m... word and the debian-sys-maint password, of course it won't automatically change the expected debian-sy... ld and new servers, you can use mysqladmin to fix it:
<code>mysql -p -u root password 'newpassword'</