> That is to say, if I booted off of A: (a 1.2MB 5.25" floppy), then during boot
> it would only find B: (a 1.44MB 3.5" floppy), and would call that fd0.
> 
> Anyone else see this?

Yes.  I tried to boot from a 1.2MB floppy (no B:) and then it could load
the kernel but it didn't find any floppies at all during probe and it crashed
when it should change root device to fd0.  I have now exchanged the floppy
for a 3.5" and now it boots the same kernel without problems.  The kernels
I tried was current from July and September.

/Tomas