Search Service Account - MOSS 2007 (Password Reset)

When are reset password for the Search Service Account, you need to make sure you change the password on the Services running with this account on all Servers.

Also you need to verify in Central Administration >> Shared Service Admin >> SSP >> Search Administration, If you are using this account as "Default Content Access Account", you need to click on it and update the new password.

If you have more than one SSP, you  need to perform this activity on all SSPs.

Also verify the Services. Central Admin >> Operations >> Services on Server.
Stop and Start the Services, which requires you to update the new Password.