I'm filing this against anaconda but it could just as well be a problem with the kernel or X. The entire system will hard lock during package installation. It's done it for me three times in a row on different packages. First on glibc-common, once on dev, and one more time on another package. I'm using boot.iso on the rawhide-20040506 tree. This is an NFS install on a Compaq Presario 1700T laptop. When the system locks, neither the keyboard or the mouse will work, so I can't get to a VC. I will try to reproduce with FTP and HTTP installs and see if it is NFS related.
FTP TUI installs work fine.
Are the keyboard LEDs flashing when this happens?
I did not notice them so I cannot say for sure.
Does this still happen?
I have not tried in a long time and I don't use this laptop any more. I'll reopen this issue if I ever dig this 4 year old laptop out.