Panic: Alignment Fault during RELEASE 5.x install

[Thoenen, Peter Mr CN Sprint SFOR]

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Been trying to get FreeBSD 5.x to work on my IBM Thinkpad X31 ever since 
RELEASE 5.0 came out.  Still not working on 5.2.1.  Get the exact same 
error every time and no idea what is causing it.  I do NOT get this 
error with RELEASE 4.x.  I get this error whether I disable ACPI or not.

Details below:

panic: alignment fault
cpuid = 0;
syncing disks, buffers remaining... 320 320 320 320
Fatal trap 18: integer divide fault while in kernel mode
cpuid = 0; apic id = 00
instruction pointer = 0x8 :0xc063831a
stack pointer       = 0x10 :0xe0793b40
frame pointer       = 0x10 :0xe0793b40
code segment        = base 0x0, limit 0xfffff, type 0x1b
                     = DPL 0, pres 1, def32 1, gran 1
processor eflags    = interrupt enabled, IOPL = 0
current process     = 11 (idle: cpu0)
trap number         = 18
panic: integer divide fault
cpuid = 0;
Uptime: 1m28s <----- :)

Note: Sometimes I don't get the Fatal trap 18.  Instead I get "giving up
on 142 (or similar number in the hundreds) buffers" then 'hit any key to
reboot'.  Uptime still under 2m :)

Somebody suggested disabling the the secondary IDE controller of the 
docking station and then at the loader prompt: 
"pci.enable.unsupported_io_modes=1" but no luck.

Thanks,

- -Peter
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