Hi Fabrice,

    WinXP SP2 guest generates random bus errors during the login process with kqemu module:
[dixond@localhost machine]$ sudo /opt/src/machine/winxp_boot.sh
Connected to host network interface: tun0
QEMU 0.6.2 monitor - type 'help' for more information
(qemu) /opt/src/machine/winxp_boot.sh: line 2:  6633 Bus error               qemu -hda winxp_hda.img -boot c -enable-audio -nics 1 -m 368 -n qemu-ifup -monitor stdio -localtime

     Let me know if there is anything I can do to help debug this.

Cheers,
--
Darryl Dixon <esrever_otua@pythonhacker.is-a-geek.net>