Restoring SQL Server databases - tips and tricks?
It looks like you did not restore a backup but you just transferred the tables with some kind of bcp tool.

Common issues with backup/restore are, in my experience:
a) Logins missing or mismatched, because they are in the master database
b) Collation problems when the collation of the server on which you restore the backup is not the same as the one from which you made the backup.

I had exactly the problems you had on sqlserver 7 when I had a primary / slave setup based on replication. The day I switched the slave as a master I had to reseed all the identity columns and process all the grants manually. This was not a surprise this was because replication does not replicate system tables and because the identity columns were set as "NOT FOR REPLICATION".