I tried to use a USB serial adaptor and it wouldn't attach, with a
build from a few days ago.  I updated last night and rebuilt, and it
still won't attach:

  uplcom0 at uhub0 port 1
  uplcom0: Prolific Technology USB-Serial Controller, rev 1.10/3.00, addr 2

  uplcom0: failed to set configuration, err=STALLED

(yes, the blank line really is in my dmesg buffer)

This is on:

NetBSD poblano.ir.bbn.com 4.99.16 NetBSD 4.99.16 (GENERIC.MP) #13: Sun Mar 25 07:51:24 EDT 2007  gdt@poblano.ir.bbn.com:/usr/obj/gdt-current/i386/sys/arch/i386/compile/GENERIC.MP i386

with very minor changes (add IPSEC, PUFFS, cgd, swwdog).

Earlier, this has worked fine, but /var/log/messages has scrolled by.