I got this with RH 8 & 9 install as well. The problem I was getting is that I was enabling Kerberos, and after this no more keyboard entries were accepted. I disabled the kerberos option and it all worked fine. I don't think that it was specfically the kerberos option. You might try doing something different when you try it again (Accept the disk check).
Not science, but it is software after all.
Best of luck,