Same problem on my machine. When I try to type the password at the first login the input box gets filled with asterisks. The only way to fix it is to switch to tty1 and restart kdm. The same machine has no problems with dapper.
-- (kdm) wrong keyboard behavior at first login https://launchpad.net/bugs/63615 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs