VMware Fusion Preview e.x.p. 1943533, Mac OS X 10.10 Yosemite Preview 14A261i.
Trying this VMware Fusion Preview for the first time, I'm attempting to migrate over a Windows 8 installation in Parallels. The VM is 34.4 GB, I have 49.6 GB available on the disk. When clicking Continue and opening the Save prompt, VMware reports 34.4 GB required, and 27.5 GB available on the disk, and won't let me continue. I'll keep playing with it.
As an aside, the text rendering on that box is very, very weird.
Can't speak to the fonts, but when working with very low disk space, finder may report different amounts available than other applications (due to trash for example).