In the Italian localization of Fusion 4.1.1, there seems to be an error in the Hard Disk VM settings, where, in the split disk option, it says
Dividi in due documenti da 2 GB (Split into two 2 GB documents)
while probably it should be
Dividi in documenti da 2 GB (Split into 2 GB documents)
Of course, usually the split disk segments are more than two, for big virtual disks.
Just FYI (personally, I rarely use split disks)...