FreeBSD 6.2 PRERELEASE boot problem

[Jack Raats]

After upgrading the ports suddenly the server does not reboot.
I get the menu 'Welcome to FreeBSD'; after pressing 1 (boot FreeBSD
default) the system halts with '/boot/kernel/acpi.ko text=0x43670
data=0x23c0+0x10f0 syms=[0x4+0x7ba+0x4+0xa828]

We tried acessing thru live cdrom whilst mounting the partition, but that
does not work.

Any suggestions how to get the system pass booting again?

Jack