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.