Comment 9 for bug 137599

Why force every user that installs virtualbox to have the kernel headers and a development environment installed? That then also puts files under /lib/modules/<kernel version> that aren't under dpkg's control, which defeats among other things, update-initramfs, since you remove the old kernel, but the virtualbox modules are still there, which means dpkg won't remove the directory, and update-initramfs says "Ah, I need to regenerate the initramfs for every directory under /lib/modules". Which now includes the old kernel, since dpkg didn't delete the directory. This leads to user confusion as well, since update-initramfs will say that it is updating the initramfs for that old kernel which the user has just removed.