After getting a good look at the data I generated, I see that the ISO itself seems fine, as Ge has pointed out. So I went ahead and tried to build KDB and DBG to get some more info, and I get this error:
[CC] drivers/video/displays/vga/objects/copybits.c drivers/video/displays/vga/objects/copybits.c:4:1: "DBG" redefined <command line>:3:1: this is the location of the previous definition make: *** [obj-i386/drivers/video/displays/vga/objects/copybits.o] Error 1
WD