And a final build error (which may not be i386-specific):  it fails making
base.tgz because it can't find libusb:

making base.tgz
pax: Unable to access ./usr/lib/libusb.so.0 <No such file or directory>
pax: Unable to access ./usr/lib/libusb.so.0.1 <No such file or directory>
*** Error code 1

Those files are listed in lists/base/obsolete.mi, which was udpated yesterday.
Hmm, I wonder if I picked up half a change?