Question about NetBSD and 'DEFAULT CATCH!'

[Bill Vinson <billvinson%nc.rr.com@localhost>]

I just downloaded the iso for NetBSD 1.5.2 to install on my iBook Dual 
USB.  When I try to boot from OpenFirmware as stated in the 
instructions.  I get the 'DEFAULT CATCH!' message.  I have seen this on 
just about every Linux PPC distro ISO I have downloaded as well.  I saw 
the entry in the FAQ for it, but I can't imaging that all the cd's are 
bad or that the screen driver and OF are in conflict as I know alot of 
other people installing Linux/NetBSD on their iBooks?

Any ideas?
Thanks,
Bill