Can you turn off "Keychain"

You could delete your keychain and then re-login to your account. This will effectively create a blank keychain which is synced to your login password.

Your keychain is located at:

Macintosh HD/Users/#USERNAME#/Library/Keychains/login.keychain

Keychain stores your passwords for applications to access when needed, such as checking for mail or syncing to .Mac, logging onto file servers, etc. Attempting to disable it would make your situation even worse. If you're getting password errors for your Admin account, boot from the Leopard installer disc and choose "Reset Password" from the Utilities menu. Follow the prompts to re-enter your Admin account password. You will likely get prompts initially after restarting for your passwords as Keychain rebuilds its list.

-Douggo

You can reset your Keychain by going into Applications/Utilities/Keychain Access and then clicking on the Keychain Access menu and then clicking on Preferences. In Preferences there is an option called Reset my Keychain. Click that and it will reset your keychain and the password errors should go away.

-Tom