changing root password in Ubuntu 9.10

After I installed Ubuntu 9.10 I tried to change the root password but after I unlocked and set password for the root account, i can’t login (via terminal) as root. I even tried to set password three times just to make sure i typed it correctly. after poking around for a bit I found some similar reports on Ubuntu's Forums and a link to “Policy on log-in-as-root tutorials” with an explanation about Ubuntu’s RootSudo policy. Apparently if you really need to login as root you can either use the “sudo -i” to simulate the root login (this will ask for your password and log you in as root), or enable the root account “sudo passwd root” (this will ask for your password and will prompt you to enter new root password).