Evening... I'm trying install my fresh 4.2 CDs on a system that is

destined to become a samba server and build machine for CF-based

firewalls.  Only I'm having a problem (obviously).  This is the third

release where I'm having this issue, but previously I just chalked it up

to old, cranky CDROM drives, and went with FTP.  But given this is all

new hardware, time to figure out what's really happening.
This system is fresh-built amd64 (but will be running/compiling all i386

binaries to avoid having to cross-compile Soekris builds), IDE DVD-ROM

drive, SATA hard drive.  Boots from CD, then gets through partitioning,

labelling, and formatting the drive just fine.  Network config sails

through, until I finally hit "Let's install the sets!".  I hit enter for

the defaults 'cd' and 'cd0', at which point I get the following:
cd0(atapiscsi0:0:0): Check Condition (error 0x70) on opcode 0x28

    SENSE KEY: Media Error

     ASC/ASCQ: ASC 0x11 ASCQ 0x06
This message repeats three times, at which point the installer gives up,

reports 'No filesystems found on cd0', and asks again where to find the

sets.  For what it's worth, this happens on four different i386 machines

of various vintage (from a 16 year old 486 up through tonight's Sempron

build), with official CD releases from 4.0 onwards.  I'm guessing I'm

missing something obvious, but Google and MARC didn't turn up anything,

so cluesticks are welcome.