I recently threw out my Sparc5 and moved to sparc64 on an Ultra10.  I was
happy with NetBSD-current for about a week, but since about the 2nd I've been
unable to make a bootable kernel.  They all die like this (copied by hand):

    Boot device: disk  File and args:
    NetBSD IEEE 1275 Bootblock
    ..>> NetBSD/sparc64 OpenFirmware Boot, Revision 1.6
    >> (rquinn@....., Tue May  6 12:12:45 EDT 2003)
    loadfile: reading header
    unknown executable format
    Program terminated

  My kernel from May 2nd works fine.  I've tried several fixes since then,
including a new bootblock, several complete rebuilds from source (throwing out
all of my /usr/obj and tooldir), and cross-compiling a GENERIC kernel from my
current i386 laptop.  My boot prom is "OpenBoot 3.25".  Is anyone else having
problems?