Problem with PPC Installation ISOs

[Curby <curby.public@gmail.com>]

Hi, it seems that recent PowerPC netinstall ISOs have very long file
names that are not properly burned to physical discs.  Specifically,
I've tried

http://cdimage.debian.org/debian-cd/4.0_r3/multi-arch/iso-cd/debian-40r3-i386-amd64-powerpc-NETINST-1.iso

Previously, i've also tried the PPC-only netinstall image for Debian
4.0 (no revision).

In every case, I check the ISO's md5sum and sha1sum against the
checksum files on the mirror.  I burn the ISO to a physical CD, and
the burning software verifies that the data is successfully burned.

Then I mount the new disc, and run md5sum -c md5sum.txt in the disc's
root directory.  Md5sum complains that some files cannot be found, and
navigating to the right places within the disc shows that the files
have truncated names.

$ pwd
/cygdrive/e/pool/main/l/linux-kernel-di-powerpc-2.6

$ ls -1 * | grep -v 'udeb$'
firmware-modules-2.6.18-6-powerpc-miboot-di_1.29etch3_powerpc.ud
nic-extra-modules-2.6.18-6-powerpc-miboot-di_1.29etch3_powerpc.u
nic-pcmcia-modules-2.6.18-6-powerpc-miboot-di_1.29etch3_powerpc
nic-shared-modules-2.6.18-6-powerpc-miboot-di_1.29etch3_powerpc
pcmcia-storage-modules-2.6.18-6-powerpc-di_1.29etch3_powerpc.ude
pcmcia-storage-modules-2.6.18-6-powerpc-miboot-di_1.29etch3_powe
pcmcia-storage-modules-2.6.18-6-powerpc64-di_1.29etch3_powerpc.u
reiserfs-modules-2.6.18-6-powerpc-miboot-di_1.29etch3_powerpc.ud
scsi-extra-modules-2.6.18-6-powerpc-miboot-di_1.29etch3_powerpc
usb-serial-modules-2.6.18-6-powerpc-miboot-di_1.29etch3_powerpc

I've tried Disk Utility on OS X, Toast on OS X, and Nero on Win XP,
and all show the same problem.

Any ideas how to get around this problem?  Ideally, I would like to
burn the multi-arch ISO so I can perform netinstalls on both i386 and
ppc machines with a single disc.  Thanks!