Download the latest version: http://www.virtualbox.org/wiki/Downloads [5]
And don’t forget to update all of your VirtualBox Guests with the latest additions:
Links:
[1] http://linux.philosweb.com/drupal/category/it/software/foss
[2] http://linux.philosweb.com/drupal/category/it/open-source-foss
[3] http://linux.philosweb.com/drupal/category/it/virtualization
[4] http://linux.philosweb.com/drupal/system/files/VBox3_2_12_2.png
[5] http://www.virtualbox.org/wiki/Downloads
[6] http://linux.philosweb.com/drupal/system/files/image_4_46.png
[7] http://linux.philosweb.com/drupal/system/files/image_2_126.png