[Cooker] urpmi and kernel architecture

{pts/1}% uname -a
Linux cooker 2.6.30-desktop-2mnb #1 SMP Thu Jun 18 19:24:48 EDT 2009
x86_64 Intel(R) Core(TM)2 Duo CPU     T8300  @ 2.40GHz GNU/Linux
{pts/0}% LC_ALL=C sudo urpmi virtualbox
In order to satisfy the 'kmod(vboxdrv)[== 2.2.4]' dependency, one of the
following packages is needed:
 1- virtualbox-kernel-2.6.30-desktop-1mnb-2.2.4-1mdv2010.0.i586:
virtualbox driver for kernel 2.6.30-desktop-1mnb (to install)
 2- virtualbox-kernel-2.6.30-desktop-2mnb-2.2.4-1mdv2010.0.i586:
virtualbox driver for kernel 2.6.30-desktop-2mnb (to install)
 3- virtualbox-kernel-2.6.30-desktop-0.rc8.1mnb-2.2.4-1mdv2010.0.i586:
virtualbox driver for kernel 2.6.30-desktop-0.rc8.1mnb (to install)
What is your choice? (1-3)

How comes that urpmi offers 32 bit kernel modules on 64 bit
architecture?