Mandriva 2008.0
Virtual Box OSE (VirtualBox-1.5.6_28266_mdv2008.0-1.i586.rpm)

[root@localhost ~]# /etc/init.d/vboxdrv setup
Stopping VirtualBox kernel module                               [  OK  ]
Recompiling VirtualBox kernel module                            [FAILED]
(Look at /var/log/vbox-install.log to find out what went wrong)

/var/log/vbox-install.log
Makefile:78: Warning: using /usr/src/linux as the source directory of your Linux kernel. If this is not correct, specify KERN_DIR=<directory> and run Make again.
Makefile:86: *** Error: /usr/src/linux (version 2.6.22.9-1mdvcustom) does not match the current kernel (version 2.6.22.18-server-1mdv).  Stop.