Apple has released
Keychain First Aid
1.0, utility software to help Mac OS X users who experience password-related problems with the system Keychain.
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Apple noted that Keychain First Aid can be used to resolve the following issues:
A user’s .Mac password is not retained in Internet preference pane, as described in technical document 107097, “Mac OS X 10.2: Won’t Save .Mac Password”.
Mail and iChat could continue to prompt users for their password after saving it in the keychain.
A user could be unexpectedly prompted to unlock the keychain after changing account information or Home directory location.
Duplicate Mail passwords could appear in the keychain, as described in technical document 106546, “Mac OS X 10.1: Re-enter Mail Password After Upgrade”.
Multiple references to the same keychain could appear in the Keychain Access application.
Applications are unable to retrieve items from a keychain file located on a network volume.
Saved passwords could not be read if they were created or modified by certain pre-release versions of Jaguar.
A Keychain dialog can sometimes prompt for permission to decrypt a “(null)” item.
Apple said that the issues Keychain First Aid resolves may be rare or intermittent, and in fact may not be experienced by all users.
Keychain First Aid 1.0 is a 101K file. It requires Mac OS X 10.1 or higher to function.