5.2 RELEASE panic : page fault

hi,
yesterday i updated to 5.2 release. today i got several times the
following error:

Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x8
fault code            = supervisor read page not present
instruction pointer   = 0x8:0xc05b5686
stack pointer         = 0x10:0xd77bbc94
frame pointer         = 0x10:0xd77bbcb0
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       = 27(swi8: tty:sio clock)
trap number           = 12
panic: page fault

and one time after manual running fsck i got:
panic: handle_written_inodeblock: live inodedep

$ uname -a
FreeBSD tyrael.linnet 5.2-RELEASE FreeBSD 5.2-RELEASE #0: Mon Jan 12
23:27:56 CET 2004     seb_at_tyrael.linnet:/usr/obj/usr/src-5.2/sys/FAST 
i386

what kind of further information could i provide ? dmesg useful ?

thx
seb