repeatable kernel -current panic running /usr/ports version of ntpd

Im getting a repeatiable kernel panic running /usr/local/bin/ntpd after
building and installing from /usr/ports/net/ntp.  This is on 5.1 -current
less than a week old.  Happens on an AMD 1000 processor and intel xeon as
well.  Anyone else seeing this:

cat /etc/ntp.conf
restrict default ignore
restrict 127.0.0.1
server sushi.compsci.lyon.edu
server ntp.drydog.com
server ntp.shorty.com
driftfile /etc/ntp.drift

su -l
exec bash
cd /usr/ports/net/ntp
make install
/usr/local/bin/ntp-genkey
/usr/local/bin/ntpd -D 99 -n
<crash>

panic: vm_fault_copy_wired: page missing
panic messages:
---
dmesg: kvm_read: 
---

warning: failed to read linker file data at 0xcc2d5700

#0  doadump () at /usr/src/sys/kern/kern_shutdown.c:240
240             dumping++;
(kgdb) where
#0  doadump () at /usr/src/sys/kern/kern_shutdown.c:240
#1  0xc030bd6b in boot (howto=256) at
/usr/src/sys/kern/kern_shutdown.c:372
#2  0xc030c176 in panic () at /usr/src/sys/kern/kern_shutdown.c:550
#3  0xc043cbc6 in vm_fault_copy_entry (dst_map=0xc6774c00,
src_map=0xcd428100, dst_entry=0xcc13c1e0, src_entry=0x0)
    at /usr/src/sys/vm/vm_fault.c:1088
#4  0xc04432b1 in vm_map_copy_entry (src_map=0xcd428100,
dst_map=0xc6774c00, src_entry=0xcc5e6ca8, dst_entry=0xcc13c1e0)
    at /usr/src/sys/vm/vm_map.c:2377
#5  0xc044358e in vmspace_fork (vm1=0xcd428100) at
/usr/src/sys/vm/vm_map.c:2492
#6  0xc043e13e in vm_forkproc (td=0xcc322e40, p2=0xcc31fd3c,
td2=0xcbd36390, flags=20) at /usr/src/sys/vm/vm_glue.c:638
#7  0xc02f6c0e in fork1 (td=0xcc322e40, flags=20, pages=0,
procp=0xe911bcd8) at /usr/src/sys/kern/kern_fork.c:656
#8  0xc02f5b9b in fork (td=0xcc322e40, uap=0xe911bd10) at
/usr/src/sys/kern/kern_fork.c:102
#9  0xc0492253 in syscall (frame=
      {tf_fs = 47, tf_es = 47, tf_ds = 47, tf_edi = 0, tf_esi = 8, tf_ebp
      = -1077938920, tf_isp = -384713356, tf_ebx = 1, tf_edx =
      -1077938984, tf_ecx = 7, tf_eax = 2, tf_trapno = 22, tf_err = 2,
      tf_eip = 1209264127, tf_cs = 31, tf_eflags = 646, tf_esp =
      -1077938948, tf_ss = 47}) at /usr/src/sys/i386/i386/trap.c:1008
#10 0xc047988d in Xint0x80_syscall () at {standard input}:145
---Can't read userspace from dump, or kernel process---