While adding an ISO file to a newly created virtual machine in VirtualBox 4.2.10, the program just stops working, but when I open it again and go again to add the ISO, it's adding OK. When I made another virtual machine it happened again - first time VirtualBox crashed when adding an ISO. Everything happened on an Ubuntu 13.04 host with Gnome Shell.
Move the VM to a native linux partition as this is a permissions issue.
Answered by @RobotHumans in comments.