Re: how to make a copy of .VDI image?
I came up against this problem, but instead of using the clone tool, I just do a standard copy of the image (.vdi) and then change the UUID:F:\VirtualBox Images>"C:\Program Files\Sun\VirtualBox\VBoxManage.exe" internalcommands sethduuid HdImageName.vdi
This seems to work fine for me and is a little quicker than waiting for the whole thing to clone.
Hope that helps.