This bug is still marked as "Needs info". I think it should be pretty straight-forward to confirm it: the network install needs a file that was released a week after the official Dapper release.
-- installing "server" variant from alternate, file not found https://launchpad.net/bugs/49269 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
