[CentOS] 5.1 Anaconda Install Error

I'm unable to install x86_64 on a host. The installer gets through the first 
part, asking for install type and it begins loading the images from whatever 
media was selected.

Then anaconda spills a series of cryptic messages ending in 'file not found' 
and the console on F2 is locked up. I've tried this with physical DVD media, 
PXE-HTTP and media-boot HTTP install. It happens every time.

This is a reinstall to this host. The weird thing is that I was able to 
install to this host from this media previously.

I've seen the note at bugs.centos.org regarding an incorrect .discinfo file 
but that doesn't seem to be it. The .diskinfo file:

1195929648.203590
Final
x86_64
1,2,3,4,5,6,7
CentOS/base
/home/buildcentos/CENTOS/5.1/en/x86_64/CentOS
CentOS/pixmaps

Does anyone have any idea what's going on?

Kirk Bocek