i386/71392: 5.3-Beta2 crash

[db]

I've just upgraded my system to 5.3-Beta4 and now a "shutdown -p now" gives 
me:

Uptime: 1m35s
Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address = 0xc
fault code = supervisor write, page not present
instruction pointer = 0x8:0xc0572654
stack pointer = 0x10:0xd41e5cbc
frame pointer = 0x10:0xd41e5cdc
code segment = base 0x0, limit 0xffff, type 0x1b
             = DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 16 (irq 5: re0)
trap nubmer = 12
panic: page fault
cpuid = 0
Uptime: 1m40s