-x doesn't work in cp

[Pär Lidén]

Hello.
It seems -x doesn't work in cp. When I tried to copy my whole "/" 
filesystem to a new, freshly formatted filesystem, cp did copy files in
/devfs, /home and /proc, despite these being different filesystems. This
is very bad, cause the whole process hung when cp tried to copy some files
in /proc.
The command line I used (while standing in "/") was
cp -ax * /mnt
with the new filesystem mounted on /mnt

I'm using the testing distribution of Debian, with kernel 2.6.0-test3.
The coreutils version reported by "cp --version" is 5.0, and Debian
package management says 5.0-5.

Regards
   Pär Lidén