I no ploblem VirtualBox when start.
But I started GuestOS(WindowsXP).
Popup window that MenuBar and screen of Black.
few second, Window is closed and print this message.

###!!! ASSERTION: failed to deserialize/set exception: ‘NS_SUCCEEDED(rv)’, file /usr/ports/emulators/virtualbox-ose/work/VirtualBox-3.1.2_OSE/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/ipcDConnectService.cpp, line 2591
Break: at file /usr/ports/emulators/virtualbox-ose/work/VirtualBox-3.1.2_OSE/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/ipcDConnectService.cpp, line 2591
ipcDConnectService Stats
=> number of worker threads: 1
nsStringStats
=> mAllocCount: 192
=> mReallocCount: 15
=> mFreeCount: 192
=> mShareCount: 91
=> mAdoptCount: 10
=> mAdoptFreeCount: 10

$ dmesg
Copyright (c) 1992-2009 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 8.0-RELEASE-p2 #4: Sat Jan 9 08:47:07 JST 2010
takao@brian.milkcup.jp:/usr/src/sys/i386/compile/BRIAN
Timecounter “i8254″ frequency 1193182 Hz quality 0
CPU: VIA Esther processor 1200MHz (1197.01-MHz 686-class CPU)
Origin = “CentaurHauls” Id = 0x6a9 Stepping = 9
Features=0xa7c9bbff
Features2=0×181
VIA Padlock Features=0x3fcc
real memory = 1055784960 (1006 MB)
avail memory = 1023148032 (975 MB)
ACPI APIC Table:
ioapic0 irqs 0-23 on motherboard
kbd1 at kbdmux0
cryptosoft0: on motherboard
padlock0: on motherboard
acpi0: on motherboard
acpi0: [ITHREAD]
ACPI Error: Package List length (8) larger than NumElements count (2), truncat
20090521 dsobject-590
ACPI Error: Package List length (8) larger than NumElements count (2), truncat
20090521 dsobject-590
acpi0: Power Button (fixed)
acpi0: reservation of 0, a0000 (3) failed
acpi0: reservation of 100000, 3ede0000 (3) failed
Timecounter “ACPI-fast” frequency 3579545 Hz quality 1000
acpi_timer0: port 0×408-0x40b on acpi0
acpi_button0: on acpi0
acpi_button1: on acpi0
pcib0: port 0xcf8-0xcff on acpi0
pci0: on pcib0
pcib1: at device 1.0 on pci0
pci1: on pcib1
vgapci0: mem 0xf4000000-0xf7ffffff,0xfb000000-0xfbffff irq 16 at device 0.0 on pci1
fwohci0: port 0xfc00-0xfc7f mem 0xfdfff000-0xfdfff7ff i 17 at device 13.0 on pci0
fwohci0: [ITHREAD]
fwohci0: OHCI version 1.10 (ROM=1)
fwohci0: No. of Isochronous channels is 4.
fwohci0: EUI64 00:40:63:50:00:09:bc:1a
fwohci0: Phy 1394a available S400, 2 ports.
fwohci0: Link S400, max_rec 2048 bytes.
firewire0: on fwohci0
dcons_crom0: on firewire0
dcons_crom0: bus_addr 0x8ba240
fwe0: on firewire0
if_fwe0: Fake Ethernet address: 02:40:63:09:bc:1a
fwe0: Ethernet address: 02:40:63:09:bc:1a
fwip0: on firewire0
fwip0: Firewire address: 00:40:63:50:00:09:bc:1a @ 0xfffe00000000, S400, maxre2048
fwohci0: Initiate bus reset
fwohci0: fwohci_intr_core: BUS reset
fwohci0: fwohci_intr_core: node_id=0×00000000, SelfID Count=1, CYCLEMASTER mod
vge0: port 0xf800-0xf8ff mem 0xfdffe000-0xfde0ff irq 18 at device 14.0 on pci0
miibus0: on vge0
ciphy0: PHY 1 on miibus0
ciphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-X, auto
vge0: Ethernet address: 00:40:63:ee:99:89
vge0: [ITHREAD]
atapci0: port 0xf400-0xf407,0xf000-0xf003,0xec00xec07,0xe800-0xe803,0xe400-0xe40f,0xe000-0xe0ff irq 20 at device 15.0 on pci0
atapci0: [ITHREAD]
ata2: on atapci0
ata2: [ITHREAD]
ata3: on atapci0
ata3: [ITHREAD]
atapci1: port 0x1f0-0x1f7,0x3f6,0×170-0×177,0x370xdc00-0xdc0f at device 15.1 on pci0
ata0: on atapci1
ata0: [ITHREAD]
ata1: on atapci1
ata1: [ITHREAD]
uhci0: port 0xd800-0xd81f irq 21 at device 16.0 onci0
uhci0: [ITHREAD]
uhci0: LegSup = 0×0010
usbus0: on uhci0
uhci1: port 0xd400-0xd41f irq 21 at device 16.1 onci0
uhci1: [ITHREAD]
uhci1: LegSup = 0×0010
usbus1: on uhci1
uhci2: port 0xd000-0xd01f irq 21 at device 16.2 onci0
uhci2: [ITHREAD]
uhci2: LegSup = 0×0010
usbus2: on uhci2
ehci0: mem 0xfdffd000-0xfdffd0ff irq 21 at deve 16.4 on pci0
ehci0: [ITHREAD]
usbus3: EHCI version 1.0
usbus3: on ehci0
isab0: at device 17.0 on pci0
isa0: on isab0
pci0: at device 17.5 (no driver attached)
ahc0: port 0xc000-0xc0ff mem 0xfdffc000-0xfdcfff irq 17 at device 20.0 on pci0
ahc0: [ITHREAD]
aic7880: Ultra Wide Channel A, SCSI Id=7, 16/253 SCBs
acpi_tz0: on acpi0
atrtc0: port 0×70-0×73 irq 8 on acpi0
uart0: port 0x3f8-0x3ff irq 4 flags 0×10 on acpi0
uart0: [FILTER]
uart0: console (9600,n,8,1)
uart1: port 0x2f8-0x2ff irq 3 on acpi0
uart1: [FILTER]
cpu0: on acpi0
acpi_perf0: on cpu0
p4tcc0: on cpu0
pmtimer0 on isa0
orm0: at iomem 0xd0000-0xd07ff,0xd1000-0xd1fff pnpid ORM0000n isa0
sc0: at flags 0×100 on isa0
sc0: VGA
vga0: at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
atkbdc0: at port 0×60,0×64 on isa0

Thanks,
m!