Fatal page fault in supervisor mode

[Nicolas <c.r.n.a%wanadoo.fr@localhost>]

Hi NetBSD-Current users,

I'm trying to install netbsd 5.99.8 but when the cd load, i have this 
message:

boot device: cd0
root on cd0a dumps on cd0b
uvm_fault (0xc0a34100, 0, 2) -> 0xe
fatal page fault in supervisor mode
trap type 6 code 2 eip c06faaf4 cs8 eflags 10206 cr2 14 ilevel 0
kernel: supervisor trap page fault, code=0
Stopped in pid 0.1 (system) at netbsd: _atomic_inc_32+0x4: lock incl 0 
(% edx)
db{0} >


Do you know this problem ?

Thanks in advance,
Niko.