Comment 2 for bug 279754

Temporary solution for this is to install intrepid without having the virtual hard drive accessed the virtio way. Just plain simple /dev/hda type. After installation is finish, I shutdown the machine and switch to virtio block device. The change to /dev/vda is not a problem because UUID is used.

Hardy can be installed with virtio enabled.
Intrepid network works under the installation with virtio-net enabled.
Intrepid partitioning under the installation works with virtio enabled.