FW: problems with ACPI

hi,

i rebuild yesterday to version -current, but now i get a error during
reboot.

fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x0
fault code              = supervisor read, page not pressent
instruction pointer     = 0x8:0xc09bbef3
stack pointer           = 0x10:0xc21ae4
frame pointer           = 0x10:0xc0c21afc
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 0 (swapper)
kernel: type 12 trap, code=0
Stopped at   AcpiNsWalkNamespace+0x53   movzbl  0x1(%eax),%eax

if i start with ACPI disabled, there seems to be no problem.
but i think acpi is needed

can someone tell me what happens..

tx
harry