Trouble booting Debian on Firewire iBook

[Brian Dunnette <brian@nadasutra.net>]

Okay... so I've (supposedly) gotten Debian installed on my iBook, and did the
voodoo with the bootstrap partition (mkofboot --boot /dev/hda9 -m 
/target/etc/ofboot.b --root /dev/hda11 --partition 11).  When I try to do "boot hd:9" or "boot hd:9, yaboot", though, I get this message:

MAC-PARTS: LOAD (noninterposed) not supportedload-size=0 adler32=1
LOAD-SIZE is too small

Any idea why this is?  Just for reference, here's my partitioning scheme:

hda1-8: Apple stuff
hda9: Apple_Bootstrap
hda10: swap
hda11: /
hda12: MacOS

Thanks!
Brian Dunnette