I've followed the guide going around about migrating linux user accounts over to a new system. All seemed to go ok, I didn't toast the /etc/passwd or /etc/shadow files and home directories look right. But one thing I did notice is that the migrated /etc/shadow entries are a much smaller strings, and one user that tried so far is not able to login. I have not confirmed this myself though. I am going from Fedora Core 2 (yes) to 14. Since there is a 32bit vs. 64bit difference also I wonder if that affects the generation of the has in the /etc/shadow and if the old entires can be reused.
Is there a way to migrate/convert the old passwords to the new system? As I would prefer not to make everyone reset their password if not truly necessary. Or should the old entries work fine and something else is wrong?