I changed my password a few months ago from the password I first used when I installed Ubuntu on my machine. I tried to add a Google Talk account to Empathy, but every time Empathy gives me a message saying the following:
Enter password to unlock your login keyring
The password you use to log in to your computer no longer matches that of your login keyring.
I do not remember my original password and I'm not sure if I should go to Prefrences > Passwords and Keys and delete my login password or if there is a way to change the keyring so that it matches up with my current password.
If you don't know the password you originally used with the keyring, then you cannot change it to your new login password. You'll have to delete it and have it create a new one for you.