USB stick installation problems

Hi

I download and copied 8.0-BETA1-amd64-memstick.img to an usb stick as
described at
http://lists.freebsd.org/pipermail/freebsd-stable/2009-July/051018.html.

I can boot it and sysinstall runs fine. Later i chose USB stick as
install medium but then i get a "no USB stick found" error. Is this an
know bug?

Regards,
Thomas