9-CURRENT panic

Hello,

 I'm trying to boot 9-CURRENT amd64 from 4/6/2010 and I'm hitting a panic.

ACPI enabled / Default:

real memory = 2147483648 (2048 MB)
avail memory = 2043375616 (1948 MB)
ACPI APIC Table: <DELL   FX09    >
panic: AP #1 (PHY# 1) failed!
cpuid = 0
KDB: enter: panic
[ thread pid 0 tid 0 ]
Stopped at     kbd_enter+0x3d? movq     $0,0x6b9260(%rip)
> trace
Tracing pid 0 tid 0 td 0xffffffff80c6da00
kdb_enter() at kdb_enter+0x3d
panic() at panic+0x17b
cpu_mp_start() at cpu_mp_start+0x5c6
mp_start() at mp_start+0x58
mi_startup() at mi_startup+0x59
btext() at btext+0x2c


ACPI disabled and/or Safe Mode:

em0 <Interl(R) PRO/1000 Network Connection 7.0.0> port 0xfe00-0xfe1f mem
0xfdfc000-0xfdfdffff,0xfdfff000-0xfdffffff irq 10 at device 25.0 on pci0
em0: Setup MSIX failure
em0: Unable to allocate bus resource: interrupt

Fatal trap 9: general protection fault while in kernel mode
cpuid = 0; apic id = 00
instruction pointer = 0x20:0xffffffff805dcf00
stack pointer = 0x28:0xfffffffff81061810
frame pointer = 0x28:0xffffffff81061860
code segment = base 0x0, limit 0xfffff, type 0x1b
  = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 0 (swapper)
[ thread pid 0 tid 100000 ]
Stopped at rman_get_flags: movq (%rdi),$rax
db> 2

... keyboard is stuck at this point.


 I'm using the snapshot ISO from
ftp://ftp.freebsd.org/pub/FreeBSD/snapshots/201004/FreeBSD-9.0-CURRENT-201004-amd64-memstick.img.
I was able to install it from the USB stick but had to try booting it 3x to
bypass the panic. Now after it's installed it, won't boot no matter what.

 This is a Dell Vostro 200 desktop with a Intel Core 2 Duo (E4500)
processor, 2GB of RAM, 160GB WD disk, onboard Intel NIC and offboard Realtek
NIC. ACPI Suspend Type is set to S3 (STR) on the BIOS.

Thank you,

-- 
Giovanni