If you are doing an in-place upgrade from Tiger to Leopard without using the Apple Leopard Install DVD, you may need a way to convert existing local or mobile accounts from NetInfo to the dslocal store.
Here’s a script that converts local accounts; it requires the nicl binary, which you can copy from any Tiger installation.
For local accounts, it uses nicl to read the account info, and dscl to create a new corresponding account. For mobile accounts, it uses createmobileaccount to recreate the mobile account.
Enjoy.
Managing OS X 