Sylvestre, I just rebuilt from scratch using a freshly updated sid-cowbuilder image and FWIW I can't reproduce your error. Here the lsb_release and uname output from inside my cowbuilder environment:
# lsb_release -a No LSB modules are available. Distributor ID: Debian Description: Debian GNU/Linux unstable (sid) Release: unstable Codename: sid # uname -a Linux perrin 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:24 UTC 2011 x86_64 GNU/Linux Are you, by any chance, building on i686? Michael -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org