After my latest setup of ubuntu 10.04, I was facing problem with the keyring password access whenever I was accessing yahoo on Empathy.
To change gnome-keyring password graphically
Places ==> Home Folder
then, ctrl+h to view the hidden files.
.gnome2 ==> keyrings
delete the the file default.keyring
next time when you’ll try anything like that, it’ll ask for new password.
To change gnome-keyring password for CLI
to keep backup of the original file
mv ~/.gnome2/keyrings/default.keyring ~/.gnome2/keyrings/default.keyring.bak