Could it be the same problem as here (not in Virtualbox, but with 12.10 installed and an extended partition) :
https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1080701 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1081632 Title: ubiquity hangs forever if you try to install on a computer with Mint 14 installed. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1081632/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
