panic: invalid PDPE on recend amd64

Hi,

Booting amd64 kernel panic in pmap_demote_DMAP(): invalid PDPE

This is on:

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FreeBSD 9.0-CURRENT #1 r214542+ac89f9b: Sat Oct 30 09:40:45 UTC 2010
    root_at_:/usr/obj/usr/src/sys/kernel i386
CPU: Intel(R) Core(TM)2 CPU         T5500  _at_ 1.66GHz (1662.54-MHz 686-class CPU)
  Origin = "GenuineIntel"  Id = 0x6f2  Family = 6  Model = f  Stepping = 2
  Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  Features2=0xe3bd<SSE3,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM>
  AMD Features=0x20100000<NX,LM>
  AMD Features2=0x1<LAHF>
  TSC: P-state invariant
real memory  = 2147483648 (2048 MB)
avail memory = 2087346176 (1990 MB)
ACPI APIC Table: <HP     30A2    >
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
FreeBSD/SMP: 1 package(s) x 2 core(s)
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  1
ioapic0: Changing APIC ID to 1
ioapic0 <Version 2.0> irqs 0-23 on motherboard
acpi0: <HPQOEM SLIC-MPC> on motherboard
acpi0: Power Button (fixed)
acpi0: reservation of 0, a0000 (3) failed