Comment 7 for bug 594593

I can't reproduce this error.
Please give us some more information:
- kupfer version (kupfer -v or apt-cache policy kupfer)
- exact virtualbox version (apt-cache policy virtualbox-3.2)

You can try my patches by downloading this version:
http://github.com/KarolBedkowski/kupfer-adds/tarball/69756f4e930393b0bca4ed1b847de8271f36f706

Please cleanup cache before running it (rm -rf ~/.cache/kupfer).