Problems booting Solaris 10 U8 with GRUB

[Turner, Ian]

It looks like the command-line arguments are not getting passed through. 
Solaris is looking for an amd64 kernel even though I specified not to on the 
command line.

Grub configuration:

menuentry "Solaris 10" {
    set root=(pxe)
    set kernel="/sun/boot/pxefiles/multiboot"
    set module="/sun/boot/pxefiles/x86.miniroot "
    echo "Loading ${kernel} ..."
    multiboot ${kernel} kernel/unix -v -B
    echo "Loading ${module} ..."
    module ${module}
    echo "Booting Solaris ..."
    boot
}

Grub seems to run fine, but then I get:

Panic: cannot open kernel/amd64/unix
Press any key to reboot

Note that this works fine using the Sun-provided pxegrub, which is based on 
0.9x. Thoughts?

--Ian