In case this is useful. One of my machines just had a panic (transcribed by me): panic: bad pte cpuid = 0 KDB: stack backtrace: #0 0xffffffff80603f6e at kdb_backtrace+0x5e #1 0xffffffff805d1ae7 at panic+0x187 #2 0xffffffff808b5c08 at pmap_remove_pages+0x408 #3 0xffffffff805a3435 at exec_new_vmspace+0x285 #4 0xffffffff80589d20 at exec_elf64_imgact+0x3f0 #5 0xffffffff805a3813 at kern_execve+0x3b3 #6 0xffffffff805a4bed at execve+0x3d #7 0xffffffff8060ff55 at syscallenter+0x1e5 #8 0xffffffff808bce6b at syscall+0x4b #9 0xffffffff808a5642 at Xfast_syscall+0xe2 Uptime: 1d0h10m39s The machine is running FreeBSD 8.2-stable: root@kg-quiet# uname -a FreeBSD kg-quiet.kg4.no 8.2-STABLE FreeBSD 8.2-STABLE #0: Sun Apr 3 19:49:05 CEST 2011 root@kg-quiet.kg4.no:/usr/obj/usr/src/sys/GENERIC amd64 Hardware info here: http://sites.google.com/site/tingox/rs480m2 HTH -- Torfinn