7.0 RC2 kernel panic with Kqemu/AMD64

I am using FreeBSD 7.0 RC2 and have installed Qemu with KQemu kernel
accelerator via ports.  I experience repeatable kernel panics (log below)
after a few minutes of use.  Before that, everything seemed to be working
ok.  Is this a problem with the kernel?

Regards,
John

Feb 16 03:02:48 draco syslogd: kernel boot file is /boot/kernel/kernel
Feb 16 03:02:48 draco kernel:
Feb 16 03:02:48 draco last message repeated 3 times
Feb 16 03:02:48 draco kernel: Fatal trap a
Feb 16 03:02:48 draco kernel: kernel trap 12 with interrupts disabled
Feb 16 03:02:48 draco kernel:
Feb 16 03:02:48 draco kernel:
Feb 16 03:02:48 draco kernel: Fatal trap 12: page fault while in kernel mode
Feb 16 03:02:48 draco kernel: cpuid = 0; apic id = 00
Feb 16 03:02:48 draco kernel: fault virtual address     = 0x782
Feb 16 03:02:48 draco kernel: fault code                = supervisor write
data, page not present
Feb 16 03:02:48 draco kernel: instruction pointer       = 0x9f80:0x297
Feb 16 03:02:48 draco kernel: stack pointer             =
0x10:0xffffffffab9d9f80
Feb 16 03:02:48 draco kernel: frame pointer             = 0x10:0xffffffff
Feb 16 03:02:48 draco kernel: code segment              = base 0x0, limit
0xfffff, type 0x1b
Feb 16 03:02:48 draco kernel: = DPL 0, pres 1, long 1, def32 0, gran 1
Feb 16 03:02:48 draco kernel: processor eflags  = IOPL = 0
Feb 16 03:02:48 draco kernel: current process           = 2242
(qemu-system-x86_64)
Feb 16 03:02:48 draco kernel: trap number               = 12
Feb 16 03:02:48 draco kernel: panic: page fault
Feb 16 03:02:48 draco kernel: cpuid = 0
Feb 16 03:02:48 draco kernel: Uptime: 10h32m8s
Feb 16 03:02:48 draco kernel: Copyright (c) 1992-2008 The FreeBSD Project.
Feb 16 03:02:48 draco kernel: Copyright (c) 1979, 1980, 1983, 1986, 1988,
1989, 1991, 1992, 1993, 1994
Feb 16 03:02:48 draco kernel: The Regents of the University of California.
All rights reserved.
Feb 16 03:02:48 draco kernel: FreeBSD is a registered trademark of The
FreeBSD Foundation.
Feb 16 03:02:48 draco kernel: FreeBSD 7.0-RC2-p1 #0: Tue Feb 12 21:29:24
UTC 2008
Feb 16 03:02:48 draco kernel:
root_at_amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC
Feb 16 03:02:48 draco kernel: Timecounter "i8254" frequency 1193182 Hz
quality 0
Feb 16 03:02:48 draco kernel: CPU: AMD Athlon(tm) 64 X2 Dual Core
Processor 5000+ (2600.27-MHz K8-class CPU)
Feb 16 03:02:48 draco kernel: Origin = "AuthenticAMD"  Id = 0x60fb2 
Stepping = 2
Feb 16 03:02:48 draco kernel:
Features=0x178bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2,HTT>
Feb 16 03:02:48 draco kernel: Features2=0x2001<SSE3,CX16>
Feb 16 03:02:48 draco kernel: AMD
Features=0xea500800<SYSCALL,NX,MMX+,FFXSR,RDTSCP,LM,3DNow!+,3DNow!>
Feb 16 03:02:48 draco kernel: AMD
Features2=0x11f<LAHF,CMP,SVM,ExtAPIC,CR8,Prefetch>
Feb 16 03:02:48 draco kernel: Cores per package: 2
Feb 16 03:02:48 draco kernel: usable memory = 2067275776 (1971 MB)
Feb 16 03:02:48 draco kernel: avail memory  = 1994817536 (1902 MB)
Feb 16 03:02:48 draco kernel: ACPI APIC Table: <082307 APIC1639>
Feb 16 03:02:48 draco kernel: FreeBSD/SMP: Multiprocessor System Detected:
2 CPUs
Feb 16 03:02:48 draco kernel: cpu0 (BSP): APIC ID:  0
Feb 16 03:02:48 draco kernel: cpu1 (AP): APIC ID:  1