I did a quick grep of the Linux 2.6.24 source code, and found this message in:
arch/x86/kernel/head_32.S
starting at line 581. I don't know whether this actually makes a
difference, but I thought you might want to know.
Out of curiosity, I also tried the -486 flavour. This also fails, but
the failure seems to occur somewhat later in the boot process. The
last messages I see are: